Dart SDK Spelling b, c, and d.

R=kmillikin@google.com
BUG=

Review-Url: https://codereview.chromium.org/2850783002 .

build/config/compiler/BUILD.gn

@@ -90,7 +90,7 @@ config("compiler") {
 
     # Linker warnings.
     if (current_cpu != "arm" && !is_mac) {
-      # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
+      # TODO(jochen): Enable this on ChromeOS on arm. http://crbug.com/356580
       ldflags += [ "-Wl,--fatal-warnings" ]
     }
 

build/mac/chrome_mac.croc

@@ -6,7 +6,7 @@
   'rules' : [
     # Specify inclusions before exclusions, since rules are in order.
 
-    # Don't include chromeos, linux, or windows specific files
+    # Don't include ChromeOS, linux, or windows specific files
     {
       'regexp' : '.*(_|/)(chromeos|linux|win|views)(\\.|_)',
       'include' : 0,

build/win/chrome_win.croc

@@ -6,7 +6,7 @@
   'rules' : [
     # Specify inclusions before exclusions, since rules are in order.
 
-    # Don't include chromeos, posix, or linux specific files
+    # Don't include ChromeOS, posix, or linux specific files
     {
       'regexp' : '.*(_|/)(chromeos|linux|posix)(\\.|_)',
       'include' : 0,

pkg/analysis_server/benchmark/integration/input_converter.dart

@@ -204,7 +204,7 @@ abstract class CommonInputConverter extends Converter<String, Operation> {
 
   /**
    * Process the expected response by completing the given completer
-   * with the result if it has alredy been received,
+   * with the result if it has already been received,
    * or caching the completer to be completed when the server
    * returns the associated result.
    * Return a future that completes when the response is received

pkg/analysis_server/benchmark/integration/operation.dart

@@ -222,7 +222,7 @@ class WaitForAnalysisCompleteOperation extends Operation {
         completer.complete();
         return;
       }
-      // Timeout if no communcation received within the last 60 seconds.
+      // Timeout if no communication received within the last 60 seconds.
       double currentTime = driver.server.currentElapseTime;
       double lastTime = driver.server.lastCommunicationTime;
       if (currentTime - lastTime > 60) {

pkg/analysis_server/lib/src/plugin/result_collector.dart

@@ -28,7 +28,7 @@ class ResultCollector<E> {
    * A multi-keyed map, where the first key is the (normalized and absolute)
    * path to the file associated with the results, and the second is the id of
    * the plugin that provided the partial results. The value is the partial
-   * results contrinuted by the plugin for the file.
+   * results contributed by the plugin for the file.
    */
   Map<String, Map<String, E>> resultMap = <String, Map<String, E>>{};
 

pkg/analysis_server/lib/src/services/refactoring/refactoring.dart

@@ -126,7 +126,7 @@ abstract class ExtractLocalRefactoring implements Refactoring {
    *
    * It does not perform all the checks (such as checking for conflicts with any
    * existing names in any of the scopes containing the current name), as many
-   * of these checkes require search engine. Use [checkFinalConditions] for this
+   * of these checks require search engine. Use [checkFinalConditions] for this
    * level of checking.
    */
   RefactoringStatus checkName();
@@ -215,7 +215,7 @@ abstract class ExtractMethodRefactoring implements Refactoring {
    *
    * It does not perform all the checks (such as checking for conflicts with any
    * existing names in any of the scopes containing the current name), as many
-   * of these checkes require search engine. Use [checkFinalConditions] for this
+   * of these checks require search engine. Use [checkFinalConditions] for this
    * level of checking.
    */
   RefactoringStatus checkName();
@@ -427,7 +427,7 @@ abstract class RenameRefactoring implements Refactoring {
    *
    * It does not perform all the checks (such as checking for conflicts with any
    * existing names in any of the scopes containing the current name), as many
-   * of these checkes require search engine. Use [checkFinalConditions] for this
+   * of these checks require search engine. Use [checkFinalConditions] for this
    * level of checking.
    */
   RefactoringStatus checkNewName();

pkg/analysis_server/lib/src/source/caching_pub_package_map_provider.dart

@@ -125,7 +125,7 @@ class CachingPubPackageMapProvider extends PubPackageMapProvider {
       // has changed while running pub list. This is done
       // by writing to a file rather than getting millisecondsSinceEpoch
       // because file modification time has different granularity
-      // on diferent systems.
+      // on different systems.
       int startStamp;
       try {
         startStamp = _writeFile(_touchFile, 'touch');

pkg/analysis_server/lib/src/watch_manager.dart

@@ -22,7 +22,7 @@ typedef void HandleWatchEvent<T>(WatchEvent event, List<T> tokens);
  * An object that manages a collections of folders that need to be watched in
  * order to ensure that we are watching the minimum number of folders.
  *
- * Each folder can be watched multiple times. In order to differenciate between
+ * Each folder can be watched multiple times. In order to differentiate between
  * the watch requests, each watch request has a *token* associated with it. The
  * tokens that are used must correctly implement both [==] and [hashCode].
  */

pkg/analysis_server/test/stress/utilities/server.dart

@@ -111,7 +111,7 @@ class RequestData {
   RequestData(this.id, this.method, this.params, this.requestTime);
 
   /**
-   * Return the number of milliseconds that elapsed betwee the request and the
+   * Return the number of milliseconds that elapsed between the request and the
    * response. This getter assumes that the response was received.
    */
   int get elapsedTime => responseTime - requestTime;

pkg/analyzer/lib/src/codegen/text_formatter.dart

@@ -16,7 +16,7 @@ final RegExp whitespace = new RegExp(r'\s');
 /**
  * Convert the HTML in [desc] into text, word wrapping at width [width].
  *
- * If [javadocStyle] is true, then the output is compatable with Javadoc,
+ * If [javadocStyle] is true, then the output is compatible with Javadoc,
  * which understands certain HTML constructs.
  */
 String nodesToText(List<dom.Node> desc, int width, bool javadocStyle,

pkg/analyzer/lib/src/error/codes.dart

@@ -2995,7 +2995,7 @@ class StaticTypeWarningCode extends ErrorCode {
       const StaticTypeWarningCode(
           'UNDEFINED_METHOD_WITH_CONSTRUCTOR',
           "The method '{0}' isn't defined for the class '{1}', but a constructor with that name is defined.",
-          "Try adding 'new' or 'const' to invoke the constuctor, or "
+          "Try adding 'new' or 'const' to invoke the constructor, or "
           "correcting the name to the name of an existing method.");
 
   /**
@@ -3617,7 +3617,7 @@ class StaticWarningCode extends ErrorCode {
   static const StaticWarningCode FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE =
       const StaticWarningCode(
           'FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE',
-          "The parameter type '{0}' is incompatable with the field type '{1}'.",
+          "The parameter type '{0}' is incompatible with the field type '{1}'.",
           "Try changing or removing the parameter's type, or "
           "changing the field's type.");
 

pkg/analyzer/lib/src/generated/error_verifier.dart

@@ -3824,9 +3824,10 @@ class ErrorVerifier extends RecursiveAstVisitor<Object> {
   }
 
   /**
-   * Verify that final fields in the given clas [declaration] that are declared,
-   * without any constructors in the enclosing class, are initialized. Cases in
-   * which there is at least one constructor are handled at the end of
+   * Verify that final fields in the given class [declaration] that are
+   * declared, without any constructors in the enclosing class, are
+   * initialized. Cases in which there is at least one constructor are handled
+   * at the end of
    * [_checkForAllFinalInitializedErrorCodes].
    *
    * See [CompileTimeErrorCode.CONST_NOT_INITIALIZED], and

pkg/analyzer/lib/src/generated/utilities_general.dart

@@ -23,7 +23,7 @@ bool isTrue(Object value) =>
 
 /**
  * Safely convert the given [value] to a bool value, or return `null` if the
- * value coult not be converted.
+ * value could not be converted.
  */
 bool toBool(Object value) {
   if (value is bool) {

pkg/analyzer/lib/src/kernel/ast_from_analyzer.dart

@@ -729,7 +729,7 @@ class ExpressionScope extends TypeScope {
   /// Throws a NoSuchMethodError corresponding to a call to [memberName] on
   /// [receiver] with the given [arguments].
   ///
-  /// If provided, [candiateTarget] provides the expected arity and argument
+  /// If provided, [candidateTarget] provides the expected arity and argument
   /// names for the best candidate target.
   ast.Expression buildThrowNoSuchMethodError(
       ast.Expression receiver, String memberName, ast.Arguments arguments,

pkg/analyzer/lib/src/summary/link.dart

@@ -3951,7 +3951,7 @@ class MethodElementForLink extends ExecutableElementForLink_NonLocal
  * member of an element that is not a container (e.g. accessing the "length"
  * property of a constant).
  *
- * Accesses to a chain of non-static members separated by '.' are andled by
+ * Accesses to a chain of non-static members separated by '.' are handled by
  * creating a [NonstaticMemberElementForLink] that points to another
  * [NonstaticMemberElementForLink], to whatever nesting level is necessary.
  */

pkg/analyzer/test/src/task/strong/inferred_type_test.dart

@@ -2894,7 +2894,7 @@ var d = <dynamic, dynamic>{'a': 'b'};     // map literals
 var e = new A()..x = 3; // cascades
 var f = 2 + 3;          // binary expressions are OK if the left operand
                         // is from a library in a different strongest
-                        // conected component.
+                        // connected component.
 var g = -3;
 var h = new A() + 3;
 var i = /*error:UNDEFINED_OPERATOR,info:DYNAMIC_INVOKE*/- new A();

pkg/compiler/README.md

@@ -309,7 +309,7 @@ funtionality is publicly exposed.
   corresponding classes when we create the corresponding JS model, removing the
   need of the fake elements.
 
-* `lib/src/colors.dart`: ANSII support for reporting error messages with colors.
+* `lib/src/colors.dart`: ANSI support for reporting error messages with colors.
 
   AI: this file should move under a utilities folder.
 

pkg/compiler/lib/src/constants/expressions.dart

@@ -196,7 +196,7 @@ class SyntheticConstantExpression extends ConstantExpression {
 
 /// A boolean, int, double, string, or null constant.
 abstract class PrimitiveConstantExpression extends ConstantExpression {
-  /// The primitive value of this contant expression.
+  /// The primitive value of this constant expression.
   get primitiveValue;
 }
 

pkg/compiler/lib/src/inferrer/locals_handler.dart

@@ -430,7 +430,7 @@ class LocalsHandler {
    * If [keepOwnLocals] is true, the types of locals in this
    * [LocalsHandler] are being used in the merge. [keepOwnLocals]
    * should be true if this [LocalsHandler], the dominator of
-   * all [handlers], also direclty flows into the join point,
+   * all [handlers], also directly flows into the join point,
    * that is the code after all [handlers]. For example, consider:
    *
    * [: switch (...) {

pkg/compiler/lib/src/inferrer/type_graph_nodes.dart

@@ -619,7 +619,7 @@ class ParameterTypeInformation extends ElementTypeInformation {
     if (!inferrer.backend.canFunctionParametersBeUsedForGlobalOptimizations(
             element.functionDeclaration) ||
         inferrer.annotations.assumeDynamic(declaration)) {
-      // Do not infer types for parameters that have a correspondign annotation
+      // Do not infer types for parameters that have a corresponding annotation
       // or that are assigned by synthesized calls.
       giveUp(inferrer);
       return safeType(inferrer);
@@ -1308,7 +1308,7 @@ class NarrowTypeInformation extends TypeInformation {
 
 /**
  * An [InferredTypeInformation] is a [TypeInformation] that
- * defaults to the dynamic type until it is marked as beeing
+ * defaults to the dynamic type until it is marked as being
  * inferred, at which point it computes its type based on
  * its assignments.
  */

pkg/compiler/lib/src/io/position_information.dart

@@ -694,7 +694,7 @@ class Offset {
   final int subexpressionOffset;
 
   /// The `left-to-right` offset of the step. This is like [subexpressionOffset]
-  /// bute restricted so that the offset of each subexpression in execution
+  /// but restricted so that the offset of each subexpression in execution
   /// order is monotonically increasing.
   ///
   /// For instance:

pkg/compiler/lib/src/js/placeholder_safety.dart

@@ -167,7 +167,7 @@ class PlaceholderSafetyAnalysis extends js.BaseVisitor<int> {
       if (canBeNull(receiver)) safe = false;
       return value;
     }
-    // Be conserative with unrecognized LHS expressions.
+    // Be conservative with unrecognized LHS expressions.
     safe = false;
     return leftToRight();
   }

pkg/compiler/lib/src/js/rewrite_async.dart

@@ -1676,7 +1676,7 @@ class AsyncRewriter extends AsyncRewriterBase {
   /// - The completer object [completer]
   final js.Expression asyncHelper;
 
-  /// Contructor used to initialize the [completer] variable.
+  /// Constructor used to initialize the [completer] variable.
   ///
   /// Specific to async methods.
   final js.Expression newCompleter;
@@ -1799,7 +1799,7 @@ class AsyncRewriter extends AsyncRewriterBase {
 class SyncStarRewriter extends AsyncRewriterBase {
   bool get isSyncStar => true;
 
-  /// Contructor creating the Iterable for a sync* method. Called with
+  /// Constructor creating the Iterable for a sync* method. Called with
   /// [bodyName].
   final js.Expression newIterable;
 
@@ -1966,7 +1966,7 @@ class AsyncStarRewriter extends AsyncRewriterBase {
   /// - null.
   final js.Expression asyncStarHelper;
 
-  /// Contructor used to initialize the [controllerName] variable.
+  /// Constructor used to initialize the [controllerName] variable.
   ///
   /// Specific to async* methods.
   final js.Expression newController;

pkg/compiler/lib/src/js_backend/namer.dart

@@ -1044,7 +1044,7 @@ class Namer {
   /// This is the name used for deriving property names of accessors (getters
   /// and setters) and as property name for storing methods and method stubs.
   ///
-  /// [suffixes] denote an extension of [originalName] to distiguish it from
+  /// [suffixes] denote an extension of [originalName] to distinguish it from
   /// other members with that name. These are used to encode the arity and
   /// named parameters to a method. Disambiguating the same [originalName] with
   /// different [suffixes] will yield different disambiguated names.

pkg/compiler/lib/src/js_backend/runtime_types.dart

@@ -91,7 +91,7 @@ abstract class RuntimeTypesSubstitutions {
 
   Substitution getSubstitution(ClassElement cls, ClassElement other);
 
-  /// Compute the required type checkes and substitutions for the given
+  /// Compute the required type checks and substitutions for the given
   /// instantitated and checked classes.
   TypeChecks computeChecks(
       Set<ClassElement> instantiated, Set<ClassElement> checked);

pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart

@@ -1342,7 +1342,7 @@ class Emitter implements js_emitter.Emitter {
       statements.add(buildDeferredHeader());
     }
 
-    // Collect the AST for the decriptors
+    // Collect the AST for the descriptors.
     Map<Element, ClassBuilder> descriptors = elementDescriptors[mainFragment];
     if (descriptors == null) descriptors = const {};
 

pkg/compiler/lib/src/mirrors_used.dart

@@ -453,32 +453,32 @@ class MirrorUsageBuilder {
         result.add(type.element);
       } else {
         String string = entry;
-        LibraryElement libraryCandiate;
-        String libraryNameCandiate;
+        LibraryElement libraryCandidate;
+        String libraryNameCandidate;
         for (LibraryElement l in compiler.libraryLoader.libraries) {
           if (l.hasLibraryName) {
             String libraryName = l.libraryName;
             if (string == libraryName) {
               // Found an exact match.
-              libraryCandiate = l;
-              libraryNameCandiate = libraryName;
+              libraryCandidate = l;
+              libraryNameCandidate = libraryName;
               break;
             } else if (string.startsWith('$libraryName.')) {
-              if (libraryNameCandiate == null ||
-                  libraryNameCandiate.length < libraryName.length) {
-                // Found a better candiate
-                libraryCandiate = l;
-                libraryNameCandiate = libraryName;
+              if (libraryNameCandidate == null ||
+                  libraryNameCandidate.length < libraryName.length) {
+                // Found a better candidate
+                libraryCandidate = l;
+                libraryNameCandidate = libraryName;
               }
             }
           }
         }
         Element e;
-        if (libraryNameCandiate == string) {
-          e = libraryCandiate;
-        } else if (libraryNameCandiate != null) {
-          e = resolveLocalExpression(libraryCandiate,
-              string.substring(libraryNameCandiate.length + 1).split('.'));
+        if (libraryNameCandidate == string) {
+          e = libraryCandidate;
+        } else if (libraryNameCandidate != null) {
+          e = resolveLocalExpression(libraryCandidate,
+              string.substring(libraryNameCandidate.length + 1).split('.'));
         } else {
           e = resolveExpression(string);
         }

pkg/compiler/lib/src/resolution/semantic_visitor.dart

@@ -330,7 +330,7 @@ abstract class SemanticSendVisitor<R, A> {
   R visitDynamicPropertyInvoke(
       Send node, Node receiver, NodeList arguments, Selector selector, A arg);
 
-  /// Conditinal invocation of the property defined by [selector] on [receiver]
+  /// Conditional invocation of the property defined by [selector] on [receiver]
   /// with [arguments], if [receiver] is not null.
   ///
   /// For instance:
@@ -2201,7 +2201,7 @@ abstract class SemanticSendVisitor<R, A> {
   R errorInvalidSetIfNull(Send node, ErroneousElement error, Node rhs, A arg);
 
   /// If-null assignment expression of [rhs] to the class type literal
-  /// [contant]. That is, [rhs] is only evaluated and assigned, if the value
+  /// [constant]. That is, [rhs] is only evaluated and assigned, if the value
   /// is of the [constant] is `null`. The behavior is thus equivalent to a type
   /// literal access.
   ///

pkg/dart_messages/lib/generated/shared_messages.json

@@ -441,7 +441,7 @@
     ],
     "template": "The method '#{memberName}' is not defined for the class '#{className}', but a constructor with that name is defined.",
     "templateHoleOrder": null,
-    "howToFix": "Try adding 'new' or 'const' to invoke the constuctor, or change the method name.",
+    "howToFix": "Try adding 'new' or 'const' to invoke the constructor, or change the method name.",
     "options": null,
     "usedBy": [
       "Platform.analyzer"
@@ -686,4 +686,4 @@
       "const foo = 0  main() { foo = 5; }"
     ]
   }
-}
+}

pkg/dart_messages/lib/shared_messages.dart

@@ -532,7 +532,7 @@ final Map<String, Message> MESSAGES = {
       categories: [Category.staticTypeWarning],
       template: "The method '#{memberName}' is not defined for the class"
           " '#{className}', but a constructor with that name is defined.",
-      howToFix: "Try adding 'new' or 'const' to invoke the constuctor, or "
+      howToFix: "Try adding 'new' or 'const' to invoke the constructor, or "
           "change the method name.",
       usedBy: [analyzer],
       examples: const [

pkg/dev_compiler/doc/GENERIC_METHODS.md

@@ -110,7 +110,7 @@ almost anywhere you would expect in a generic method.
     ```
 
     Note that generic methods are not yet supported *at runtime* on the VM and
-    dartjs. On those platforms, uses of generic method type arguments are
+    dart2js. On those platforms, uses of generic method type arguments are
     treated like `dynamic` today. So in this example, `pair`'s reified type at
     runtime will be `List<dynamic>` and `set` will be `Set<dynamic>`.
 

pkg/dev_compiler/lib/src/compiler/code_generator.dart

@@ -3231,7 +3231,7 @@ class CodeGenerator extends Object
     if (op == '??') {
       // Desugar `l ??= r` as ((x) => x == null ? l = r : x)(l)
       // Note that if `x` contains subexpressions, we need to ensure those
-      // are also evaluated only once. This is similar to desguaring for
+      // are also evaluated only once. This is similar to desugaring for
       // postfix expressions like `i++`.
 
       // Handle the left hand side, to ensure each of its subexpressions are
@@ -4386,7 +4386,7 @@ class CodeGenerator extends Object
 
     // If the consumer of the expression is '==' or '!=' with a constant that
     // fits in 31 bits, adding a coercion does not change the result of the
-    // comparision, e.g.  `a & ~b == 0`.
+    // comparison, e.g.  `a & ~b == 0`.
     if (parent is BinaryExpression) {
       var tokenType = parent.operator.type;
       Expression left = parent.leftOperand;

pkg/dev_compiler/test/codegen/BenchmarkBase.dart

@@ -48,7 +48,7 @@ class BenchmarkBase {
   // Not measured setup code executed prior to the benchmark runs.
   void setup() {}
 
-  // Not measures teardown code executed after the benchark runs.
+  // Not measures teardown code executed after the benchmark runs.
   void teardown() {}
 
   // Measures the score for this benchmark by executing it repeately until

pkg/dev_compiler/tool/input_sdk/lib/html/dart2js/html_dart2js.dart

@@ -11997,7 +11997,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    *
    * Setting the height or width properties will set the height or width
    * property for all elements in the list. This returns a rectangle with the
-   * dimenions actually available for content
+   * dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Getting the height or width returns the height or width of the
    * first Element in this list.
@@ -12012,7 +12012,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding box
    * in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -12027,7 +12027,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding +
    * border box in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -12040,7 +12040,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding +
    * border + margin box in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13916,7 +13916,7 @@ class Element extends Node
   /**
    * Access this element's content position.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not.
@@ -13932,7 +13932,7 @@ class Element extends Node
   /**
    * Access the dimensions and position of this element's content + padding box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13953,7 +13953,7 @@ class Element extends Node
    * Access the dimensions and position of this element's content + padding +
    * border box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13972,7 +13972,7 @@ class Element extends Node
    * Access the dimensions and position of this element's content + padding +
    * border + margin box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -20047,7 +20047,7 @@ class HttpRequest extends HttpRequestEventTarget {
    *
    * Note: Most simple HTTP requests can be accomplished using the [getString],
    * [request], [requestCrossOrigin], or [postFormData] methods. Use of this
-   * `open` method is intended only for more complext HTTP requests where
+   * `open` method is intended only for more complex HTTP requests where
    * finer-grained control is needed.
    */
   @DomName('XMLHttpRequest.open')
@@ -20334,7 +20334,7 @@ class HttpRequest extends HttpRequestEventTarget {
    *
    * Note: Most simple HTTP requests can be accomplished using the [getString],
    * [request], [requestCrossOrigin], or [postFormData] methods. Use of this
-   * `send` method is intended only for more complext HTTP requests where
+   * `send` method is intended only for more complex HTTP requests where
    * finer-grained control is needed.
    *
    * ## Other resources
@@ -25944,7 +25944,7 @@ class Node extends EventTarget {
 
   @JSName('textContent')
   /**
-   * All text within this node and its decendents.
+   * All text within this node and its descendents.
    *
    * ## Other resources
    *
@@ -25973,7 +25973,7 @@ class Node extends EventTarget {
   /**
    * Returns a copy of this node.
    *
-   * If [deep] is `true`, then all of this node's children and decendents are
+   * If [deep] is `true`, then all of this node's children and descendents are
    * copied as well. If [deep] is `false`, then only this node is copied.
    *
    * ## Other resources
@@ -33837,7 +33837,7 @@ class Touch extends Interceptor {
   final dynamic _get_target;
 
 // As of Chrome 37, these all changed from long to double.  This code
-// preserves backwards compatability for the time being.
+// preserves backwards compatibility for the time being.
   int get __clientX => JS('num', '#.clientX', this).round();
   int get __clientY => JS('num', '#.clientY', this).round();
   int get __screenX => JS('num', '#.screenX', this).round();
@@ -35399,7 +35399,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35411,7 +35411,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35423,7 +35423,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35435,7 +35435,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35447,7 +35447,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -43131,7 +43131,7 @@ class _KeyboardEventHandler extends EventStreamProvider<KeyEvent> {
   }
 
   /**
-   * Given the charater code returned from a keyDown [event], try to ascertain
+   * Given the character code returned from a keyDown [event], try to ascertain
    * and return the corresponding charCode for the character that was pressed.
    * This information is not shown to the user, but used to help polyfill
    * keypress events.
@@ -44524,7 +44524,7 @@ class KeyEvent extends _WrappedEvent implements KeyboardEvent {
     // we set it with our specified values. Because we are doing custom setting
     // of certain values (charCode/keyCode, etc) only in this class (as opposed
     // to KeyboardEvent) and the way we set these custom values depends on the
-    // type of underlying JS object, we do all the contruction for the
+    // type of underlying JS object, we do all the construction for the
     // underlying KeyboardEvent here.
     if (canUseDispatchEvent) {
       // Currently works in everything but Internet Explorer.

pkg/dev_compiler/tool/input_sdk/lib/js/dart2js/js_dart2js.dart

@@ -76,7 +76,7 @@
  * [JsObject.jsify] constructor, which converts Dart [Map]s and [Iterable]s
  * into JavaScript Objects and Arrays.
  *
- * The following expression creats a new JavaScript object with the properties
+ * The following expression creates a new JavaScript object with the properties
  * `a` and `b` defined:
  *
  *     var jsMap = new JsObject.jsify({'a': 1, 'b': 2});
@@ -568,8 +568,8 @@ Expando<Function> _interopCaptureThisExpando = new Expando<Function>();
 /// binding and calls [f] with the value of this passed as the first argument.
 /// When called from Dart, [null] will be passed as the first argument.
 ///
-/// See the documention for [allowInterop]. This method should only be used with
-/// package:js Dart-JavaScript interop.
+/// See the documentation for [allowInterop]. This method should only be used
+/// with package:js Dart-JavaScript interop.
 Function allowInteropCaptureThis(Function f) {
   var ret = _interopCaptureThisExpando[f];
   if (ret == null) {

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart

@@ -614,7 +614,7 @@ notNull(x) {
 ///
 // TODO(jmesserly): this could be faster
 // TODO(jmesserly): we can use default values `= dynamic` once #417 is fixed.
-// TODO(jmesserly): move this to classes for consistentcy with list literals?
+// TODO(jmesserly): move this to classes for consistency with list literals?
 map(values, [K, V]) => JS(
     '',
     '''(() => {

pkg/dev_compiler/tool/input_sdk/private/foreign_helper.dart

@@ -35,7 +35,7 @@ library dart._foreign_helper;
  * accurately.  In addition to the union type already described:
  *
  *  + `=Object` is a plain JavaScript object.  Some DOM methods return instances
- *     that have no corresponing Dart type (e.g. cross-frame documents),
+ *     that have no corresponding Dart type (e.g. cross-frame documents),
  *     `=Object` can be used to describe these untyped' values.
  *
  *  + `var` (or empty string).  If the entire [typeDescription] is `var` (or

pkg/dev_compiler/tool/input_sdk/private/js_array.dart

@@ -584,7 +584,7 @@ class JSArray<E> implements List<E>, JSIndexable<E> {
  * getInterceptor always returns JSArray.  We should consider pushing the
  * 'isGrowable' and 'isMutable' checks into the getInterceptor implementation so
  * these classes can have specialized implementations. Doing so will challenge
- * many assuptions in the JS backend.
+ * many assumptions in the JS backend.
  */
 class JSMutableArray<E> extends JSArray<E> {}
 

pkg/dev_compiler/tool/input_sdk/private/js_helper.dart

@@ -766,7 +766,7 @@ class Returns {
  * This example declares a Dart field + getter + setter called `$dom_title` that
  * corresponds to the JavaScript property `title`.
  *
- *     class Docmument native "*Foo" {
+ *     class Document native "*Foo" {
  *       @JSName('title')
  *       String $dom_title;
  *     }

pkg/front_end/lib/src/fasta/scanner/token.dart

@@ -301,7 +301,7 @@ class SyntheticSymbolToken extends SymbolToken {
 /**
  * A [BeginGroupToken] represents a symbol that may be the beginning of
  * a pair of brackets, i.e., ( { [ < or ${
- * The [endGroup] token points to the matching closing bracked in case
+ * The [endGroup] token points to the matching closing bracket in case
  * it can be identified during scanning.
  */
 class BeginGroupToken extends SymbolToken

pkg/front_end/lib/src/fasta/type_inference/type_inference_engine.dart

@@ -98,7 +98,7 @@ abstract class TypeInferenceEngineImpl<F> extends TypeInferenceEngine<F> {
 
   TypeInferenceEngineImpl(this.instrumentation, this.strongMode);
 
-  /// Cleares the initializer of [field].
+  /// Clears the initializer of [field].
   void clearFieldInitializer(F field);
 
   /// Creates a [FieldNode] to track dependencies of the given [field].

pkg/front_end/testcases/DeltaBlue.dart

@@ -148,7 +148,7 @@ abstract class Constraint {
   /**
    * Normal constraints are not input constraints.  An input constraint
    * is one that depends on external state, such as the mouse, the
-   * keybord, a clock, or some arbitraty piece of imperative code.
+   * keybord, a clock, or some arbitrary piece of imperative code.
    */
   bool isInput() => false;
 }

pkg/front_end/tool/fasta_perf.dart

@@ -197,7 +197,7 @@ class _PartialAstBuilder extends AstBuilder {
 }
 
 // Invoke the fasta kernel generator for the program starting in [entryUri]
-// TODO(sigmund): update to uyse the frontend api once fasta is beind hit.
+// TODO(sigmund): update to use the frontend api once fasta is being hit.
 generateKernel(Uri entryUri,
     {bool compileSdk: true, bool strongMode: false}) async {
   // TODO(sigmund): this is here only to compute the input size,

pkg/kernel/lib/frontend/super_initializers.dart

@@ -33,8 +33,8 @@ void moveSuperInitializerLast(Constructor node) {
   // [LocalInitializer]s.
   initializers.length += argumentCount;
   initializers.setRange(
-      superIndex + argumentCount, // desination start (inclusive)
-      initializers.length - 1, // desination end (exclusive)
+      superIndex + argumentCount, // destination start (inclusive)
+      initializers.length - 1, // destination end (exclusive)
       initializers, // source list
       superIndex + 1); // source start index
   initializers[initializers.length - 1] = superCall;

pkg/kernel/lib/transformations/treeshaker.dart

@@ -446,7 +446,7 @@ class TreeShaker {
       Class class_ = root.getClass(table);
 
       // This is a class which will be instantiated by non-Dart code (whether it
-      // has a valid generative construtor or not).
+      // has a valid generative constructor or not).
       _addInstantiatedClass(class_);
 
       // We keep all the constructors of externally instantiated classes.

pkg/testing/lib/src/run_tests.dart

@@ -87,24 +87,24 @@ class CommandLine {
       if (!await new File(configurationPath).exists()) {
         Directory test = new Directory("test");
         if (await test.exists()) {
-          List<FileSystemEntity> candiates = await test
+          List<FileSystemEntity> candidates = await test
               .list(recursive: true, followLinks: false)
               .where((FileSystemEntity entity) {
             return entity is File && entity.uri.path.endsWith("/testing.json");
           }).toList();
-          switch (candiates.length) {
+          switch (candidates.length) {
             case 0:
               return fail("Couldn't locate: '$configurationPath'.");
 
             case 1:
-              configurationPath = candiates.single.path;
+              configurationPath = candidates.single.path;
               break;
 
             default:
               return fail(
                   "Usage: run_tests.dart [$configPrefix=configuration_file]\n"
                   "Where configuration_file is one of:\n  "
-                  "${candiates.map((file) => file.path).join('\n  ')}");
+                  "${candidates.map((file) => file.path).join('\n  ')}");
           }
         }
       }

runtime/bin/gen_snapshot.cc

@@ -898,7 +898,7 @@ static void PrintUsage() {
 " program. The format of this manifest is as follows. Each line in the       \n"
 " manifest is a comma separated list of three elements. The first entry is   \n"
 " the library URI, the second entry is the class name and the final entry    \n"
-" the function name. The file must be terminated with a newline charater.    \n"
+" the function name. The file must be terminated with a newline character.   \n"
 "                                                                            \n"
 "   Example:                                                                 \n"
 "     dart:something,SomeClass,doSomething                                   \n"

runtime/lib/string_patch.dart

@@ -101,7 +101,7 @@ abstract class _StringBase {
    * Create the most efficient string representation for specified
    * [charCodes].
    *
-   * Only uses the character codes betwen index [start] and index [end] of
+   * Only uses the character codes between index [start] and index [end] of
    * `charCodes`. They must satisfy `0 <= start <= end <= charCodes.length`.
    *
    * The [limit] is an upper limit on the character codes in the iterable.

runtime/observatory/lib/src/elements/helpers/tag.dart

@@ -9,7 +9,7 @@ class Tag<T extends HtmlElement> {
   /// Tag name.
   final String name;
 
-  /// Dependend tags that need to be registred for this tag to work properly.
+  /// Dependent tags that need to be registred for this tag to work properly.
   final Iterable<Tag> dependencies;
 
   const Tag(this.name, {this.dependencies: const []});

runtime/observatory/tests/service/weak_properties_test.dart

@@ -55,7 +55,7 @@ var tests = [
     expect(prop.key, isNull);
     expect(prop.value, isNull);
     Instance loadedProp = await prop.load();
-    // Object ids are not cannonicalized, so we rely on the key and value
+    // Object ids are not canonicalized, so we rely on the key and value
     // being the sole instances of their classes to test we got the objects
     // we expect.
     expect(loadedProp.key, isNotNull);

runtime/platform/globals.h

@@ -288,7 +288,7 @@ typedef simd128_value_t fpu_register_t;
 #define DART_UNUSED
 #endif
 
-// DART_NORETURN indicates to the compiler that a function doees not return.
+// DART_NORETURN indicates to the compiler that a function does not return.
 // It should be used on functions that unconditionally call functions like
 // exit(), which end the program. We use it to avoid compiler warnings in
 // callers of DART_NORETURN functions.
@@ -579,7 +579,7 @@ static inline void USE(T) {}
 // When you use implicit_cast, the compiler checks that the cast is safe.
 // Such explicit implicit_casts are necessary in surprisingly many
 // situations where C++ demands an exact type match instead of an
-// argument type convertable to a target type.
+// argument type convertible to a target type.
 //
 // The From type can be inferred, so the preferred syntax for using
 // implicit_cast is the same as for static_cast etc.:

runtime/tests/vm/dart/random_walk_fuzzer.dart

@@ -33,7 +33,7 @@ void main(List<String> args) {
     seed = int.parse(args[0]);
   } else {
     // Dart's built-in random number generator doesn't provide access to the
-    // seed when it is choosen by the implementation. We need to be able to
+    // seed when it is chosen by the implementation. We need to be able to
     // report this seed to make runs of the fuzzer reproducible, so we create
     // the seed ourselves.
 
@@ -176,8 +176,8 @@ void setupInterestingValues() {
   addInstance("𝄞"); // Surrogate pairs
   addInstance("𝄞"[0]); // Surrogate pairs
   addInstance("𝄞"[1]); // Surrogate pairs
-  addInstance("\u{0}"); // Non-printing charater
-  addInstance("\u{1}"); // Non-printing charater
+  addInstance("\u{0}"); // Non-printing character
+  addInstance("\u{1}"); // Non-printing character
   addInstance("f\u{0}oo"); // Internal NUL
   addInstance("blåbæ\u{0}rgrød"); // Internal NUL
   addInstance("Îñţérñåţîö\u{0}ñåļîžåţîờñ"); // Internal NUL

runtime/third_party/binary_size/src/template/D3SymbolTreeMap.js

@@ -192,7 +192,7 @@ D3SymbolTreeMap.prototype._crunchStats = function(node) {
 /**
  * Invoke the specified visitor function on all data elements currently shown
  * in the treemap including any and all of their children, starting at the
- * currently-displayed root and descening recursively. The function will be
+ * currently-displayed root and descending recursively. The function will be
  * passed the datum element representing each node. No traversal guarantees
  * are made.
  */

runtime/third_party/double-conversion/src/bignum-dtoa.cc

@@ -548,7 +548,7 @@ static void InitialScaledStartValuesNegativeExponentNegativePower(
 //
 // Let ep == estimated_power, then the returned values will satisfy:
 //  v / 10^ep = numerator / denominator.
-//  v's boundarys m- and m+:
+//  v's boundaries m- and m+:
 //    m- / 10^ep == v / 10^ep - delta_minus / denominator
 //    m+ / 10^ep == v / 10^ep + delta_plus / denominator
 //  Or in other words:

runtime/third_party/double-conversion/src/strtod.cc

@@ -528,7 +528,7 @@ float Strtof(Vector<const char> buffer, int exponent) {
          (f1 == f2 && f2 != f3 && f3 == f4) ||
          (f1 == f2 && f2 == f3 && f3 != f4));
 
-  // guess and next are the two possible canditates (in the same way that
+  // guess and next are the two possible candidates (in the same way that
   // double_guess was the lower candidate for a double-precision guess).
   float guess = f1;
   float next = f4;

runtime/vm/constants_dbc.h

@@ -986,8 +986,8 @@ const FpuRegister FpuTMP = kFakeFpuRegister;
 const intptr_t kNumberOfFpuRegisters = 1;
 
 // After a comparison, the condition NEXT_IS_TRUE means the following
-// instruction is executed if the comparision is true and skipped over overwise.
-// Conidition NEXT_IS_FALSE means the following instruction is executed if the
+// instruction is executed if the comparison is true and skipped over overwise.
+// Condition NEXT_IS_FALSE means the following instruction is executed if the
 // comparison is false and skipped over otherwise.
 enum Condition { NEXT_IS_TRUE, NEXT_IS_FALSE };
 

runtime/vm/cpu_arm.cc

@@ -148,7 +148,7 @@ void HostCPUFeatures::InitOnce() {
   // When the VM is targetted to ARMv7, pretend that the CPU is ARMv7 even if
   // the CPU is actually AArch64.
   arm_version_ = ARMv7;
-  // Always assume we have floating point unit since we dont support ARMv6 in
+  // Always assume we have floating point unit since we don't support ARMv6 in
   // this path.
   vfp_supported_ = FLAG_use_vfp;
   integer_division_supported_ = FLAG_use_integer_division;

runtime/vm/debugger.cc

@@ -2580,7 +2580,7 @@ void Debugger::FindCompiledFunctions(const Script& script,
         continue;
       }
       // Note: we need to check the functions of this class even if
-      // the class is defined in a differenct 'script'. There could
+      // the class is defined in a different 'script'. There could
       // be mixin functions from the given script in this class.
       functions = cls.functions();
       if (!functions.IsNull()) {
@@ -2648,7 +2648,7 @@ RawFunction* Debugger::FindBestFit(const Script& script,
       cls = class_table.At(i);
       // Note: if this class has been parsed and finalized already,
       // we need to check the functions of this class even if
-      // it is defined in a differenct 'script'. There could
+      // it is defined in a different 'script'. There could
       // be mixin functions from the given script in this class.
       // However, if this class is not parsed yet (not finalized),
       // we can ignore it and avoid the side effect of parsing it.

runtime/vm/debugger_api_impl.cc

@@ -15,7 +15,7 @@
 
 namespace dart {
 
-// Facilitate quick access to the current zone once we have the curren thread.
+// Facilitate quick access to the current zone once we have the current thread.
 #define Z (T->zone())
 
 #ifndef PRODUCT

runtime/vm/flow_graph.h

@@ -213,7 +213,7 @@ class FlowGraph : public ZoneAllocated {
   // Insert a redefinition of an original definition after prev and rename all
   // dominated uses of the original.  If an equivalent redefinition is already
   // present, nothing is inserted.
-  // Returns the redefintion, if a redefinition was inserted, NULL otherwise.
+  // Returns the redefinition, if a redefinition was inserted, NULL otherwise.
   RedefinitionInstr* EnsureRedefinition(Instruction* prev,
                                         Definition* original,
                                         CompileType compile_type);

runtime/vm/flow_graph_range_analysis.cc

@@ -2596,7 +2596,7 @@ static bool DependsOnSymbol(const RangeBoundary& a, Definition* symbol) {
 
 
 // Given the range and definition update the range so that
-// it covers both original range and defintions range.
+// it covers both original range and definitions range.
 //
 // The following should also hold:
 //

runtime/vm/globals.h

@@ -79,7 +79,7 @@ typedef uword cpp_vtable;
 
 
 // When using GCC we can use GCC attributes to ensure that certain
-// contants are 8 or 16 byte aligned.
+// constants are 8 or 16 byte aligned.
 #if defined(HOST_OS_WINDOWS)
 #define ALIGN8 __declspec(align(8))
 #define ALIGN16 __declspec(align(16))

runtime/vm/intermediate_language.cc

@@ -276,7 +276,7 @@ intptr_t CheckClassInstr::ComputeCidMask() const {
 
 
 bool CheckClassInstr::IsDenseMask(intptr_t mask) {
-  // Returns true if the mask is a continuos sequence of ones in its binary
+  // Returns true if the mask is a continuous sequence of ones in its binary
   // representation (i.e. no holes)
   return mask == -1 || Utils::IsPowerOfTwo(mask + 1);
 }
@@ -2314,8 +2314,8 @@ Definition* UnboxedIntConverterInstr::Canonicalize(FlowGraph* flow_graph) {
       value()->definition()->AsUnboxedIntConverter();
   if ((box_defn != NULL) && (box_defn->representation() == from())) {
     if (box_defn->from() == to()) {
-      // Do not erase truncating convertions from 64-bit value to 32-bit values
-      // because such convertions erase upper 32 bits.
+      // Do not erase truncating conversions from 64-bit value to 32-bit values
+      // because such conversions erase upper 32 bits.
       if ((box_defn->from() == kUnboxedMint) && box_defn->is_truncating()) {
         return this;
       }

runtime/vm/intermediate_language.h

@@ -1253,7 +1253,7 @@ class BlockEntryInstr : public Instruction {
   // connect live ranges at the start of the block.
   ParallelMoveInstr* parallel_move_;
 
-  // Bit vector containg loop blocks for a loop header indexed by block
+  // Bit vector containing loop blocks for a loop header indexed by block
   // preorder number.
   BitVector* loop_info_;
 

runtime/vm/isolate_reload.h

@@ -191,7 +191,7 @@ class IsolateReloadContext {
   // Reports all reasons for cancelling reload.
   void ReportReasonsForCancelling();
 
-  // Reports the deails of a reload operation.
+  // Reports the details of a reload operation.
   void ReportOnJSON(JSONStream* stream);
 
   // Store morphing operation.

runtime/vm/kernel_to_il.cc

@@ -3561,7 +3561,7 @@ FlowGraph* FlowGraphBuilder::BuildGraphOfFunction(FunctionNode* function,
       }
       if (i == (yield_continuations_.length() - 1)) {
         // We reached the last possility, no need to build more ifs.
-        // Coninue to the last continuation.
+        // Continue to the last continuation.
         // Note: continuations start with nop DropTemps instruction
         // which acts like an anchor, so we need to skip it.
         block->set_try_index(yield_continuations_[i].try_index);
@@ -3627,9 +3627,9 @@ FlowGraph* FlowGraphBuilder::BuildGraphOfFunction(FunctionNode* function,
   }
 
   if (NeedsDebugStepCheck(dart_function, function->position())) {
-    // If a switch was added above: Start the switch by injecting a debugable
+    // If a switch was added above: Start the switch by injecting a debuggable
     // safepoint so stepping over an await works.
-    // If not, still start the body with a debugable safepoint to ensure
+    // If not, still start the body with a debuggable safepoint to ensure
     // breaking on a method always happens, even if there are no
     // assignments/calls/runtimecalls in the first basic block.
     // Place this check at the last parameter to ensure parameters

runtime/vm/mirrors_api_impl.cc

@@ -19,7 +19,7 @@
 
 namespace dart {
 
-// Facilitate quick access to the current zone once we have the curren thread.
+// Facilitate quick access to the current zone once we have the current thread.
 #define Z (T->zone())
 
 

runtime/vm/object.cc

@@ -19730,7 +19730,7 @@ static double Uint64ToDouble(uint64_t x) {
   //
   // which results in a different rounding.
   //
-  // For consistency between platforms fallback to GCC style converstion
+  // For consistency between platforms fallback to GCC style conversion
   // on Win64.
   //
   const int64_t y = static_cast<int64_t>(x);

runtime/vm/object.h

@@ -4606,7 +4606,7 @@ class ExceptionHandlers : public Object {
 
 // Holds deopt information at one deoptimization point. The information consists
 // of two parts:
-//  - first a prefix consiting of kMaterializeObject instructions describing
+//  - first a prefix consisting of kMaterializeObject instructions describing
 //    objects which had their allocation removed as part of AllocationSinking
 //    pass and have to be materialized;
 //  - followed by a list of DeoptInstr objects, specifying transformation

runtime/vm/redundancy_elimination.cc

@@ -2838,7 +2838,7 @@ void AllocationSinking::RemoveUnusedMaterializations() {
     if ((mat->input_use_list() == NULL) && (mat->env_use_list() == NULL)) {
       // Check if this materialization failed to compute and remove any
       // unforwarded loads. There were no loads from any allocation sinking
-      // candidate in the beggining so it is safe to assume that any encountered
+      // candidate in the beginning so it is safe to assume that any encountered
       // load was inserted by CreateMaterializationAt.
       for (intptr_t i = 0; i < mat->InputCount(); i++) {
         LoadFieldInstr* load = mat->InputAt(i)->definition()->AsLoadField();

runtime/vm/snapshot_test.dart

@@ -731,7 +731,7 @@ class BenchmarkBase {
   // Not measured setup code executed prior to the benchmark runs.
   void setup() {}
 
-  // Not measures teardown code executed after the benchark runs.
+  // Not measures teardown code executed after the benchmark runs.
   void teardown() {}
 
   // Measures the score for this benchmark by executing it repeately until

runtime/vm/stub_code_x64.cc

@@ -1939,7 +1939,7 @@ void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
   __ pushq(Immediate(0));  // Result slot.
   __ pushq(RDI);           // Arg0: function to optimize
   __ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry, 1);
-  __ popq(RAX);  // Disard argument.
+  __ popq(RAX);  // Discard argument.
   __ popq(RAX);  // Get Code object.
   __ popq(R10);  // Restore argument descriptor.
   __ LeaveStubFrame();

runtime/vm/timer.h

@@ -39,7 +39,7 @@ class Timer : public ValueObject {
     running_ = false;
   }
 
-  // Get total cummulative elapsed time in micros.
+  // Get total cumulative elapsed time in micros.
   int64_t TotalElapsedTime() const {
     int64_t result = total_;
     if (running_) {

samples-dev/swarm/SwarmApp.dart

@@ -47,7 +47,7 @@ class Swarm extends App {
     sections.refresh();
 
     // Hook up listeners about any data source additions or deletions.  We don't
-    // differeniate additions or deletions just the fact that data feeds have
+    // differentiate additions or deletions just the fact that data feeds have
     // changed.  We might want more fidelity later.
     sections.sectionTitles.forEach((title) {
       Section section = sections.findSection(title);

samples-dev/swarm/Views.dart

@@ -47,7 +47,7 @@ class EventListeners {
 }
 
 /**
- * Private view class used to store placeholder views for detatched ListView
+ * Private view class used to store placeholder views for detached ListView
  * elements.
  */
 class _PlaceholderView extends View {
@@ -496,13 +496,13 @@ class GenericListView<D> extends View {
 
   /**
    * Detach a subview from the view replacing it with an empty placeholder view.
-   * The detatched subview can be safely reparented.
+   * The detached subview can be safely reparented.
    */
   View detachSubview(D itemData) {
     int index = findIndex(itemData);
     View view = _itemViews[index];
     if (view == null) {
-      // Edge case: add the view so we can detatch as the view is currently
+      // Edge case: add the view so we can detach as the view is currently
       // outside but might soon be inside the visible area.
       assert(!_activeInterval.contains(index));
       _addView(index);

samples-dev/swarm/swarm_ui_lib/layout/GridLayout.dart

@@ -14,7 +14,7 @@ part of layout;
  */
 // TODO(jmesserly): the DOM integration still needs work:
 //  - The grid assumes it is absolutely positioned in its container.
-//    Becasue of that, the grid doesn't work right unless it has at least one
+//    Because of that, the grid doesn't work right unless it has at least one
 //    fractional size in each dimension. In other words, only "top down" grids
 //    work at the moment, because the grid can't determine its own size.
 //    The core algorithm supports computing min breadth; the issue is about how

samples-dev/swarm/swarm_ui_lib/observable/ChangeEvent.dart

@@ -6,7 +6,7 @@ part of observable;
 
 /** A change to an observable instance. */
 class ChangeEvent {
-  // TODO(sigmund): capture language issues around enums & create a cannonical
+  // TODO(sigmund): capture language issues around enums & create a canonical
   // Dart enum design.
   /** Type denoting an in-place update event. */
   static const UPDATE = 0;

samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart

@@ -31,7 +31,7 @@ class EventBatch {
   EventBatch._internal() : summaries = new Map<int, EventSummary>();
 
   /**
-   * Ensure there is an event batch where [userFunction] can accumuluate events.
+   * Ensure there is an event batch where [userFunction] can accumulate events.
    * When the batch is complete, fire all events at once.
    */
   static Function wrap(userFunction(var a)) {

samples-dev/swarm/swarm_ui_lib/touch/TimeUtil.dart

@@ -7,7 +7,7 @@ part of touch;
 /**
  * Convenience methods for dealing with time.
  * In the future this could also provide an entry point to mock out time
- * calulation for tests.
+ * calculation for tests.
  */
 class TimeUtil {
   static int now() {

sdk/lib/_blink/dartium/_blink_dartium.dart

@@ -37966,7 +37966,7 @@ class Blink_Utils {
   }
 
   // Defines an interceptor if there is an appropriate JavaScript prototype to define it on.
-  // In any case, returns a typed JS wrapper compatibile with dart:html and the new
+  // In any case, returns a typed JS wrapper compatible with dart:html and the new
   // typed JS Interop.
   static defineInterceptorCustomElement(jsObject, Type type)
       native "Utils_defineInterceptorCustomElement";

sdk/lib/_internal/js_runtime/lib/js_array.dart

@@ -634,7 +634,7 @@ class JSArray<E> extends Interceptor implements List<E>, JSIndexable {
  * getInterceptor always returns JSArray.  We should consider pushing the
  * 'isGrowable' and 'isMutable' checks into the getInterceptor implementation so
  * these classes can have specialized implementations. Doing so will challenge
- * many assuptions in the JS backend.
+ * many assumptions in the JS backend.
  */
 class JSMutableArray<E> extends JSArray<E> implements JSMutableIndexable {}
 

sdk/lib/_internal/js_runtime/lib/js_helper.dart

@@ -3170,7 +3170,7 @@ class Returns {
  * This example declares a Dart field + getter + setter called `$dom_title` that
  * corresponds to the JavaScript property `title`.
  *
- *     class Docmument native "*Foo" {
+ *     class Document native "*Foo" {
  *       @JSName('title')
  *       String $dom_title;
  *     }

sdk/lib/_internal/js_runtime/lib/js_mirrors.dart

@@ -1295,7 +1295,7 @@ class JsInstanceMirror extends JsObjectMirror implements InstanceMirror {
 /**
  * ClassMirror for generic classes where the type parameters are bound.
  *
- * [typeArguments] will return a list of the type arguments, in constrast
+ * [typeArguments] will return a list of the type arguments, in contrast
  * to JsCLassMirror that returns an empty list since it represents original
  * declarations and classes that are not generic.
  */

sdk/lib/_internal/js_runtime/lib/js_names.dart

@@ -51,7 +51,7 @@ class _LazyMangledNamesMap {
   String operator [](String key) {
     var result = JS('var', '#[#]', _jsMangledNames, key);
     // Filter out all non-string values to protect against polution from
-    // ancilliary fields in [_jsMangledNames].
+    // ancillary fields in [_jsMangledNames].
     bool filter = JS('bool', 'typeof # !== "string"', result);
     // To ensure that the inferrer sees that result is a String, we explicitly
     // give it a better type here.
@@ -105,7 +105,7 @@ class _LazyReflectiveNamesMap {
     for (String key in keys) {
       var reflectiveName = JS('var', '#[#]', _jsMangledNames, key);
       // Filter out all non-string values to protect against polution from
-      // ancilliary fields in [_jsMangledNames].
+      // ancillary fields in [_jsMangledNames].
       bool filter = JS('bool', 'typeof # !== "string"', reflectiveName);
       if (filter) continue;
       result[reflectiveName] = JS('String', '#', key);

sdk/lib/_internal/js_runtime/lib/shared/embedded_names.dart

@@ -365,7 +365,7 @@ enum JsBuiltin {
   /// Returns the JavaScript constructor function for Dart's Object class.
   /// This can be used for type tests, as in
   ///
-  ///     var constructor = JS_BUILTIN('', JsBuiltin.dartObjectContructor);
+  ///     var constructor = JS_BUILTIN('', JsBuiltin.dartObjectConstructor);
   ///     if (JS('bool', '# instanceof #', obj, constructor))
   ///       ...
   dartObjectConstructor,

sdk/lib/core/uri.dart

@@ -4374,7 +4374,7 @@ class _SimpleUri implements Uri {
   }
 
   // Merge two simple URIs. This should always result in a prefix of
-  // one concatentated with a suffix of the other, possibly with a `/` in
+  // one concatenated with a suffix of the other, possibly with a `/` in
   // the middle of two merged paths, which is again simple.
   // In a few cases, there might be a need for extra normalization, when
   // resolving on top of a known scheme.

sdk/lib/html/dart2js/html_dart2js.dart

@@ -12029,7 +12029,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    *
    * Setting the height or width properties will set the height or width
    * property for all elements in the list. This returns a rectangle with the
-   * dimenions actually available for content
+   * dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Getting the height or width returns the height or width of the
    * first Element in this list.
@@ -12044,7 +12044,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding box
    * in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -12059,7 +12059,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding +
    * border box in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -12072,7 +12072,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding +
    * border + margin box in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13953,7 +13953,7 @@ class Element extends Node
   /**
    * Access this element's content position.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not.
@@ -13969,7 +13969,7 @@ class Element extends Node
   /**
    * Access the dimensions and position of this element's content + padding box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13990,7 +13990,7 @@ class Element extends Node
    * Access the dimensions and position of this element's content + padding +
    * border box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -14009,7 +14009,7 @@ class Element extends Node
    * Access the dimensions and position of this element's content + padding +
    * border + margin box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -20127,7 +20127,7 @@ class HttpRequest extends HttpRequestEventTarget {
    *
    * Note: Most simple HTTP requests can be accomplished using the [getString],
    * [request], [requestCrossOrigin], or [postFormData] methods. Use of this
-   * `open` method is intended only for more complext HTTP requests where
+   * `open` method is intended only for more complex HTTP requests where
    * finer-grained control is needed.
    */
   @DomName('XMLHttpRequest.open')
@@ -20414,7 +20414,7 @@ class HttpRequest extends HttpRequestEventTarget {
    *
    * Note: Most simple HTTP requests can be accomplished using the [getString],
    * [request], [requestCrossOrigin], or [postFormData] methods. Use of this
-   * `send` method is intended only for more complext HTTP requests where
+   * `send` method is intended only for more complex HTTP requests where
    * finer-grained control is needed.
    *
    * ## Other resources
@@ -26035,7 +26035,7 @@ class Node extends EventTarget {
 
   @JSName('textContent')
   /**
-   * All text within this node and its decendents.
+   * All text within this node and its descendents.
    *
    * ## Other resources
    *
@@ -26064,7 +26064,7 @@ class Node extends EventTarget {
   /**
    * Returns a copy of this node.
    *
-   * If [deep] is `true`, then all of this node's children and decendents are
+   * If [deep] is `true`, then all of this node's children and descendents are
    * copied as well. If [deep] is `false`, then only this node is copied.
    *
    * ## Other resources
@@ -33982,7 +33982,7 @@ class Touch extends Interceptor {
   final dynamic _get_target;
 
 // As of Chrome 37, these all changed from long to double.  This code
-// preserves backwards compatability for the time being.
+// preserves backwards compatibility for the time being.
   int get __clientX => JS('num', '#.clientX', this).round();
   int get __clientY => JS('num', '#.clientY', this).round();
   int get __screenX => JS('num', '#.screenX', this).round();
@@ -35552,7 +35552,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35564,7 +35564,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35576,7 +35576,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35588,7 +35588,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -35600,7 +35600,7 @@ class WebSocket extends EventTarget {
    *
    * This method accepts data of type [Blob], [ByteBuffer], [String], or
    * [TypedData]. Named variants [sendBlob], [sendByteBuffer], [sendString],
-   * or [sendTypedData], in constrast, only accept data of the specified type.
+   * or [sendTypedData], in contrast, only accept data of the specified type.
    */
   @DomName('WebSocket.send')
   @DocsEditable()
@@ -43303,7 +43303,7 @@ class _KeyboardEventHandler extends EventStreamProvider<KeyEvent> {
   }
 
   /**
-   * Given the charater code returned from a keyDown [event], try to ascertain
+   * Given the character code returned from a keyDown [event], try to ascertain
    * and return the corresponding charCode for the character that was pressed.
    * This information is not shown to the user, but used to help polyfill
    * keypress events.
@@ -44707,7 +44707,7 @@ class KeyEvent extends _WrappedEvent implements KeyboardEvent {
     // we set it with our specified values. Because we are doing custom setting
     // of certain values (charCode/keyCode, etc) only in this class (as opposed
     // to KeyboardEvent) and the way we set these custom values depends on the
-    // type of underlying JS object, we do all the contruction for the
+    // type of underlying JS object, we do all the construction for the
     // underlying KeyboardEvent here.
     if (canUseDispatchEvent) {
       // Currently works in everything but Internet Explorer.

sdk/lib/html/dartium/html_dartium.dart

@@ -13089,7 +13089,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    *
    * Setting the height or width properties will set the height or width
    * property for all elements in the list. This returns a rectangle with the
-   * dimenions actually available for content
+   * dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Getting the height or width returns the height or width of the
    * first Element in this list.
@@ -13104,7 +13104,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding box
    * in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13119,7 +13119,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding +
    * border box in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -13132,7 +13132,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    * Access dimensions and position of the first Element's content + padding +
    * border + margin box in this list.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -14875,7 +14875,7 @@ class Element extends Node
   /**
    * Access this element's content position.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not.
@@ -14891,7 +14891,7 @@ class Element extends Node
   /**
    * Access the dimensions and position of this element's content + padding box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -14912,7 +14912,7 @@ class Element extends Node
    * Access the dimensions and position of this element's content + padding +
    * border box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -14931,7 +14931,7 @@ class Element extends Node
    * Access the dimensions and position of this element's content + padding +
    * border + margin box.
    *
-   * This returns a rectangle with the dimenions actually available for content
+   * This returns a rectangle with the dimensions actually available for content
    * in this element, in pixels, regardless of this element's box-sizing
    * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
    * will return the same numerical height if the element is hidden or not. This
@@ -22361,7 +22361,7 @@ class HttpRequest extends HttpRequestEventTarget {
    *
    * Note: Most simple HTTP requests can be accomplished using the [getString],
    * [request], [requestCrossOrigin], or [postFormData] methods. Use of this
-   * `open` method is intended only for more complext HTTP requests where
+   * `open` method is intended only for more complex HTTP requests where
    * finer-grained control is needed.
    */
   @DomName('XMLHttpRequest.open')
@@ -29576,7 +29576,7 @@ class Node extends EventTarget {
       _blink.BlinkNode.instance.previousSibling_Getter_(this);
 
   /**
-   * All text within this node and its decendents.
+   * All text within this node and its descendents.
    *
    * ## Other resources
    *
@@ -29588,7 +29588,7 @@ class Node extends EventTarget {
   String get text => _blink.BlinkNode.instance.textContent_Getter_(this);
 
   /**
-   * All text within this node and its decendents.
+   * All text within this node and its descendents.
    *
    * ## Other resources
    *
@@ -29617,7 +29617,7 @@ class Node extends EventTarget {
   /**
    * Returns a copy of this node.
    *
-   * If [deep] is `true`, then all of this node's children and decendents are
+   * If [deep] is `true`, then all of this node's children and descendents are
    * copied as well. If [deep] is `false`, then only this node is copied.
    *
    * ## Other resources
@@ -39196,7 +39196,7 @@ class Touch extends DartHtmlDomObject {
       _blink.BlinkTouch.instance.target_Getter_(this));
 
 // As of Chrome 37, these all changed from long to double.  This code
-// preserves backwards compatability for the time being.
+// preserves backwards compatibility for the time being.
   int get __clientX => _blink.BlinkTouch.instance.clientX_Getter_(this).round();
   int get __clientY => _blink.BlinkTouch.instance.clientY_Getter_(this).round();
   int get __screenX => _blink.BlinkTouch.instance.screenX_Getter_(this).round();
@@ -48964,7 +48964,7 @@ class _KeyboardEventHandler extends EventStreamProvider<KeyEvent> {
   }
 
   /**
-   * Given the charater code returned from a keyDown [event], try to ascertain
+   * Given the character code returned from a keyDown [event], try to ascertain
    * and return the corresponding charCode for the character that was pressed.
    * This information is not shown to the user, but used to help polyfill
    * keypress events.
@@ -51247,7 +51247,7 @@ class _Utils {
   }
 
   /**
-   * Adds all candidate String completitions from [declarations] to [output]
+   * Adds all candidate String completions from [declarations] to [output]
    * filtering based on [staticContext] and [includePrivate].
    */
   static void _getCompletionsHelper(ClassMirror classMirror, bool staticContext,
@@ -51325,7 +51325,7 @@ class _Utils {
   }
 
   /**
-   * Get valid code completitions from within a library and all libraries
+   * Get valid code completions from within a library and all libraries
    * imported by that library.
    */
   static List<String> getLibraryCompletionsIncludingImports(String url) {

sdk/lib/internal/sort.dart

@@ -157,7 +157,7 @@ class Sort {
     bool pivots_are_equal = (compare(pivot1, pivot2) == 0);
     if (pivots_are_equal) {
       var pivot = pivot1;
-      // Degenerated case where the partitioning becomes a dutch national flag
+      // Degenerated case where the partitioning becomes a Dutch national flag
       // problem.
       //
       // [ |  < pivot  | == pivot | unpartitioned | > pivot  | ]

sdk/lib/io/http_impl.dart

@@ -881,7 +881,7 @@ class _HttpGZipSink extends ByteConversionSink {
 
 // The _HttpOutgoing handles all of the following:
 //  - Buffering
-//  - GZip compressionm
+//  - GZip compression
 //  - Content-Length validation.
 //  - Errors.
 //
@@ -1855,7 +1855,7 @@ class _HttpClient implements HttpClient {
     _connectionsChanged();
   }
 
-  // Remove a closed connnection from the active set.
+  // Remove a closed connection from the active set.
   void _connectionClosed(_HttpClientConnection connection) {
     connection.stopTimer();
     var connectionTarget = _connectionTargets[connection.key];

sdk/lib/io/http_parser.dart

@@ -805,7 +805,7 @@ class _HttpParser extends Stream<_HttpIncoming> {
   }
 
   void _onDone() {
-    // onDone cancles the subscription.
+    // onDone cancels the subscription.
     _socketSubscription = null;
     if (_state == _State.CLOSED || _state == _State.FAILURE) return;
 

sdk/lib/io/process.dart

@@ -108,7 +108,7 @@ class ProcessInfo {
    * The current resident set size of memory for the process.
    *
    * Note that the meaning of this field is platform dependent. For example,
-   * some memory acounted for here may be shared with other processes, or if
+   * some memory accounted for here may be shared with other processes, or if
    * the same page is mapped into a process's address space, it may be counted
    * twice.
    */
@@ -119,7 +119,7 @@ class ProcessInfo {
    * process.
    *
    * Note that the meaning of this field is platform dependent. For example,
-   * some memory acounted for here may be shared with other processes, or if
+   * some memory accounted for here may be shared with other processes, or if
    * the same page is mapped into a process's address space, it may be counted
    * twice.
    */

sdk/lib/js/dart2js/js_dart2js.dart

@@ -76,7 +76,7 @@
  * [JsObject.jsify] constructor, which converts Dart [Map]s and [Iterable]s
  * into JavaScript Objects and Arrays.
  *
- * The following expression creats a new JavaScript object with the properties
+ * The following expression creates a new JavaScript object with the properties
  * `a` and `b` defined:
  *
  *     var jsMap = new JsObject.jsify({'a': 1, 'b': 2});

sdk/lib/js/dartium/js_dartium.dart

@@ -76,7 +76,7 @@
  * [JsObject.jsify] constructor, which converts Dart [Map]s and [Iterable]s
  * into JavaScript Objects and Arrays.
  *
- * The following expression creats a new JavaScript object with the properties
+ * The following expression creates a new JavaScript object with the properties
  * `a` and `b` defined:
  *
  *     var jsMap = new JsObject.jsify({'a': 1, 'b': 2});
@@ -1683,8 +1683,8 @@ Expando<JSFunction> _interopCaptureThisExpando = new Expando<JSFunction>();
 /// binding and calls [f] with the value of this passed as the first argument.
 /// When called from Dart, [null] will be passed as the first argument.
 ///
-/// See the documention for [allowInterop]. This method should only be used with
-/// package:js Dart-JavaScript interop.
+/// See the documentation for [allowInterop]. This method should only be used
+/// with package:js Dart-JavaScript interop.
 JSFunction allowInteropCaptureThis(Function f) {
   if (f is JSFunction) {
     // Behavior when the function is already a JS function is unspecified.

tests/benchmark_smoke/benchmark_base.dart

@@ -47,7 +47,7 @@ class BenchmarkBase {
   /** Not measured setup code executed prior to the benchmark runs. */
   void setup() {}
 
-  /** Not measures teardown code executed after the benchark runs. */
+  /** Not measures teardown code executed after the benchmark runs. */
   void teardown() {}
 
   /**

tests/compiler/dart2js/async_await_js_transform_test.dart

@@ -982,7 +982,7 @@ function(x, y, k) async {
         } else {
           continue;
         }
-      default: // defaul case
+      default: // default case
         break lab; // break to label
       }
       foo();

tests/compiler/dart2js/constant_expression_evaluate_test.dart

@@ -288,7 +288,7 @@ Future testData(TestData data) async {
       Expect.equals(
           expectedText,
           valueText,
-          "Unexpected value '${valueText}' for contant "
+          "Unexpected value '${valueText}' for constant "
           "`${constant.toDartText()}`, expected '${expectedText}'.");
     });
   });

tests/compiler/dart2js/constant_expression_test.dart

@@ -217,12 +217,12 @@ Future testData(TestData data) async {
     Expect.equals(
         data.kind,
         constant.kind,
-        "Unexpected kind '${constant.kind}' for contant "
+        "Unexpected kind '${constant.kind}' for constant "
         "`${constant.toDartText()}`, expected '${data.kind}'.");
     Expect.equals(
         data.text,
         constant.toDartText(),
-        "Unexpected text '${constant.toDartText()}' for contant, "
+        "Unexpected text '${constant.toDartText()}' for constant, "
         "expected '${data.text}'.");
     if (data.type != null) {
       String instanceType =
@@ -230,7 +230,7 @@ Future testData(TestData data) async {
       Expect.equals(
           data.type,
           instanceType,
-          "Unexpected type '$instanceType' for contant "
+          "Unexpected type '$instanceType' for constant "
           "`${constant.toDartText()}`, expected '${data.type}'.");
     }
     if (data.fields != null) {
@@ -238,7 +238,7 @@ Future testData(TestData data) async {
       Expect.equals(
           data.fields.length,
           instanceFields.length,
-          "Unexpected field count ${instanceFields.length} for contant "
+          "Unexpected field count ${instanceFields.length} for constant "
           "`${constant.toDartText()}`, expected '${data.fields.length}'.");
       instanceFields.forEach((field, expression) {
         String name = '$field';
@@ -248,7 +248,7 @@ Future testData(TestData data) async {
             expected,
             expression,
             "Unexpected field expression ${expression} for field '$name' in "
-            "contant `${constant.toDartText()}`, expected '${expected}'.");
+            "constant `${constant.toDartText()}`, expected '${expected}'.");
       });
     }
   });

tests/compiler/dart2js/deferred_inline_restrictions_test.dart

@@ -32,7 +32,7 @@ void main() {
     var sameContextInline = lib3.find("sameContextInline");
     var ou_lib3 = outputUnitForElement(sameContextInline);
 
-    // Test that we actually got differnt output units.
+    // Test that we actually got different output units.
     Expect.notEquals(ou_lib1.name, ou_lib3.name);
 
     String mainOutput = collector.getOutput("", OutputType.js);