Add missing parameter to TableBorder.symmetric, and improve class constructors (#144279)

Originally, my aim was just to refactor (as per usual), but while messing around with the `TableBorder.symmetric` constructor, I realized that `borderRadius` was missing!

This pull request makes a few class constructors more efficient, and it fixes #144277 by adding the missing parameter.

<br>

dev/conductor/core/bin/packages_autoroller.dart

@@ -76,7 +76,7 @@ ${parser.usage}
 
   final FrameworkRepository framework = FrameworkRepository(
     _localCheckouts(token),
-    mirrorRemote: Remote.mirror(mirrorUrl),
+    mirrorRemote: const Remote.mirror(mirrorUrl),
     upstreamRemote: Remote.upstream(upstreamUrl),
   );
 

dev/conductor/core/lib/src/repository.dart

@@ -23,25 +23,11 @@ enum RemoteName {
 }
 
 class Remote {
-  const Remote({
-    required RemoteName name,
-    required this.url,
-  })  : _name = name,
-        assert(url != '');
+  const Remote({required RemoteName name, required this.url})
+      : _name = name, assert(url != '');
 
-  factory Remote.mirror(String url) {
-    return Remote(
-      name: RemoteName.mirror,
-      url: url,
-    );
-  }
-
-  factory Remote.upstream(String url) {
-    return Remote(
-      name: RemoteName.upstream,
-      url: url,
-    );
-  }
+  const Remote.mirror(String url) : this(name: RemoteName.mirror, url: url);
+  const Remote.upstream(String url) : this(name: RemoteName.upstream, url: url);
 
   final RemoteName _name;
 

dev/devicelab/lib/framework/browser.dart

@@ -422,18 +422,6 @@ Duration _computeAverageDuration(List<BlinkTraceEvent> events) {
 /// See also:
 ///  * https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview
 class BlinkTraceEvent {
-  BlinkTraceEvent._({
-    required this.args,
-    required this.cat,
-    required this.name,
-    required this.ph,
-    this.pid,
-    this.tid,
-    this.ts,
-    this.tts,
-    this.tdur,
-  });
-
   /// Parses an event from its JSON representation.
   ///
   /// Sample event encoded as JSON (the data is bogus, this just shows the format):
@@ -458,19 +446,16 @@ class BlinkTraceEvent {
   /// For detailed documentation of the format see:
   ///
   /// https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview
-  static BlinkTraceEvent fromJson(Map<String, dynamic> json) {
-    return BlinkTraceEvent._(
-      args: json['args'] as Map<String, dynamic>,
-      cat: json['cat'] as String,
-      name: json['name'] as String,
-      ph: json['ph'] as String,
-      pid: _readInt(json, 'pid'),
-      tid: _readInt(json, 'tid'),
-      ts: _readInt(json, 'ts'),
-      tts: _readInt(json, 'tts'),
-      tdur: _readInt(json, 'tdur'),
-    );
-  }
+  BlinkTraceEvent.fromJson(Map<String, dynamic> json)
+      : args = json['args'] as Map<String, dynamic>,
+        cat = json['cat'] as String,
+        name = json['name'] as String,
+        ph = json['ph'] as String,
+        pid = _readInt(json, 'pid'),
+        tid = _readInt(json, 'tid'),
+        ts = _readInt(json, 'ts'),
+        tts = _readInt(json, 'tts'),
+        tdur = _readInt(json, 'tdur');
 
   /// Event-specific data.
   final Map<String, dynamic> args;

dev/integration_tests/android_semantics_testing/lib/src/common.dart

@@ -22,8 +22,6 @@ import 'constants.dart';
 ///
 ///   * [AccessibilityNodeInfo](https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo)
 class AndroidSemanticsNode {
-  AndroidSemanticsNode._(this._values);
-
   /// Deserializes a new [AndroidSemanticsNode] from a json map.
   ///
   /// The structure of the JSON:
@@ -54,9 +52,7 @@ class AndroidSemanticsNode {
   ///         int,
   ///       ]
   ///     }
-  factory AndroidSemanticsNode.deserialize(String value) {
-    return AndroidSemanticsNode._(json.decode(value));
-  }
+  AndroidSemanticsNode.deserialize(String value) : _values = json.decode(value);
 
   final dynamic _values;
   final List<AndroidSemanticsNode> _children = <AndroidSemanticsNode>[];

dev/integration_tests/flutter_gallery/lib/gallery/demo.dart

@@ -183,8 +183,8 @@ class FullScreenCodeDialogState extends State<FullScreenCodeDialog> {
   @override
   Widget build(BuildContext context) {
     final SyntaxHighlighterStyle style = Theme.of(context).brightness == Brightness.dark
-      ? SyntaxHighlighterStyle.darkThemeStyle()
-      : SyntaxHighlighterStyle.lightThemeStyle();
+      ? SyntaxHighlighterStyle.darkThemeStyle
+      : SyntaxHighlighterStyle.lightThemeStyle;
 
     Widget body;
     if (_exampleCode == null) {

dev/integration_tests/flutter_gallery/lib/gallery/syntax_highlighter.dart

@@ -6,7 +6,7 @@ import 'package:flutter/material.dart';
 import 'package:string_scanner/string_scanner.dart';
 
 class SyntaxHighlighterStyle {
-  SyntaxHighlighterStyle({
+  const SyntaxHighlighterStyle({
     this.baseStyle,
     this.numberStyle,
     this.commentStyle,
@@ -17,31 +17,27 @@ class SyntaxHighlighterStyle {
     this.constantStyle,
   });
 
-  static SyntaxHighlighterStyle lightThemeStyle() {
-    return SyntaxHighlighterStyle(
-      baseStyle: const TextStyle(color: Color(0xFF000000)),
-      numberStyle: const TextStyle(color: Color(0xFF1565C0)),
-      commentStyle: const TextStyle(color: Color(0xFF9E9E9E)),
-      keywordStyle: const TextStyle(color: Color(0xFF9C27B0)),
-      stringStyle: const TextStyle(color: Color(0xFF43A047)),
-      punctuationStyle: const TextStyle(color: Color(0xFF000000)),
-      classStyle: const TextStyle(color: Color(0xFF512DA8)),
-      constantStyle: const TextStyle(color: Color(0xFF795548)),
-    );
-  }
+  static const SyntaxHighlighterStyle lightThemeStyle = SyntaxHighlighterStyle(
+    baseStyle: TextStyle(color: Color(0xFF000000)),
+    numberStyle: TextStyle(color: Color(0xFF1565C0)),
+    commentStyle: TextStyle(color: Color(0xFF9E9E9E)),
+    keywordStyle: TextStyle(color: Color(0xFF9C27B0)),
+    stringStyle: TextStyle(color: Color(0xFF43A047)),
+    punctuationStyle: TextStyle(color: Color(0xFF000000)),
+    classStyle: TextStyle(color: Color(0xFF512DA8)),
+    constantStyle: TextStyle(color: Color(0xFF795548)),
+  );
 
-  static SyntaxHighlighterStyle darkThemeStyle() {
-    return SyntaxHighlighterStyle(
-      baseStyle: const TextStyle(color: Color(0xFFFFFFFF)),
-      numberStyle: const TextStyle(color: Color(0xFF1565C0)),
-      commentStyle: const TextStyle(color: Color(0xFF9E9E9E)),
-      keywordStyle: const TextStyle(color: Color(0xFF80CBC4)),
-      stringStyle: const TextStyle(color: Color(0xFF009688)),
-      punctuationStyle: const TextStyle(color: Color(0xFFFFFFFF)),
-      classStyle: const TextStyle(color: Color(0xFF009688)),
-      constantStyle: const TextStyle(color: Color(0xFF795548)),
-    );
-  }
+  static const SyntaxHighlighterStyle darkThemeStyle = SyntaxHighlighterStyle(
+    baseStyle: TextStyle(color: Color(0xFFFFFFFF)),
+    numberStyle: TextStyle(color: Color(0xFF1565C0)),
+    commentStyle: TextStyle(color: Color(0xFF9E9E9E)),
+    keywordStyle: TextStyle(color: Color(0xFF80CBC4)),
+    stringStyle: TextStyle(color: Color(0xFF009688)),
+    punctuationStyle: TextStyle(color: Color(0xFFFFFFFF)),
+    classStyle: TextStyle(color: Color(0xFF009688)),
+    constantStyle: TextStyle(color: Color(0xFF795548)),
+  );
 
   final TextStyle? baseStyle;
   final TextStyle? numberStyle;
@@ -60,7 +56,7 @@ abstract class SyntaxHighlighter {
 class DartSyntaxHighlighter extends SyntaxHighlighter {
   DartSyntaxHighlighter([this._style]) {
     _spans = <_HighlightSpan>[];
-    _style ??= SyntaxHighlighterStyle.darkThemeStyle();
+    _style ??= SyntaxHighlighterStyle.darkThemeStyle;
   }
 
   SyntaxHighlighterStyle? _style;

dev/tools/gen_defaults/lib/typography_template.dart

@@ -9,9 +9,7 @@ class TypographyTemplate extends TokenTemplate {
 
   @override
   String generate() => '''
-class _M3Typography {
-  _M3Typography._();
-
+abstract final class _M3Typography {
   ${_textTheme('englishLike', 'alphabetic')}
 
   ${_textTheme('dense', 'ideographic')}

packages/flutter/lib/src/gestures/recognizer.dart

@@ -760,15 +760,15 @@ class OffsetPair {
 
   /// Creates a [OffsetPair] from [PointerEvent.localPosition] and
   /// [PointerEvent.position].
-  factory OffsetPair.fromEventPosition(PointerEvent event) {
-    return OffsetPair(local: event.localPosition, global: event.position);
-  }
+  OffsetPair.fromEventPosition(PointerEvent event)
+      : local = event.localPosition,
+        global = event.position;
 
   /// Creates a [OffsetPair] from [PointerEvent.localDelta] and
   /// [PointerEvent.delta].
-  factory OffsetPair.fromEventDelta(PointerEvent event) {
-    return OffsetPair(local: event.localDelta, global: event.delta);
-  }
+  OffsetPair.fromEventDelta(PointerEvent event)
+      : local = event.localDelta,
+        global = event.delta;
 
   /// A [OffsetPair] where both [Offset]s are [Offset.zero].
   static const OffsetPair zero = OffsetPair(local: Offset.zero, global: Offset.zero);

packages/flutter/lib/src/material/material_state.dart

@@ -321,12 +321,6 @@ abstract class MaterialStateBorderSide extends BorderSide implements MaterialSta
   /// const constructors so that they can be used in const expressions.
   const MaterialStateBorderSide();
 
-  /// Returns a [BorderSide] that's to be used when a Material component is
-  /// in the specified state. Return null to defer to the default value of the
-  /// widget or theme.
-  @override
-  BorderSide? resolve(Set<MaterialState> states);
-
   /// Creates a [MaterialStateBorderSide] from a
   /// [MaterialPropertyResolver<BorderSide?>] callback function.
   ///
@@ -364,8 +358,13 @@ abstract class MaterialStateBorderSide extends BorderSide implements MaterialSta
   ///   }),
   /// ),
   /// ```
-  static MaterialStateBorderSide resolveWith(MaterialPropertyResolver<BorderSide?> callback) =>
-      _MaterialStateBorderSide(callback);
+  const factory MaterialStateBorderSide.resolveWith(MaterialPropertyResolver<BorderSide?> callback) = _MaterialStateBorderSide;
+
+  /// Returns a [BorderSide] that's to be used when a Material component is
+  /// in the specified state. Return null to defer to the default value of the
+  /// widget or theme.
+  @override
+  BorderSide? resolve(Set<MaterialState> states);
 }
 
 /// A [MaterialStateBorderSide] created from a
@@ -381,9 +380,7 @@ class _MaterialStateBorderSide extends MaterialStateBorderSide {
   final MaterialPropertyResolver<BorderSide?> _resolve;
 
   @override
-  BorderSide? resolve(Set<MaterialState> states) {
-    return _resolve(states);
-  }
+  BorderSide? resolve(Set<MaterialState> states) => _resolve(states);
 }
 
 /// Defines an [OutlinedBorder] whose value depends on a set of [MaterialState]s
@@ -457,8 +454,7 @@ abstract class MaterialStateTextStyle extends TextStyle implements MaterialState
   ///
   /// The given callback parameter must return a non-null text style in the default
   /// state.
-  static MaterialStateTextStyle resolveWith(MaterialPropertyResolver<TextStyle> callback) =>
-      _MaterialStateTextStyle(callback);
+  const factory MaterialStateTextStyle.resolveWith(MaterialPropertyResolver<TextStyle> callback) = _MaterialStateTextStyle;
 
   /// Returns a [TextStyle] that's to be used when a Material component is in the
   /// specified state.
@@ -520,8 +516,7 @@ abstract class MaterialStateOutlineInputBorder extends OutlineInputBorder implem
   ///
   /// The given callback parameter must return a non-null text style in the default
   /// state.
-  static MaterialStateOutlineInputBorder resolveWith(MaterialPropertyResolver<InputBorder> callback) =>
-      _MaterialStateOutlineInputBorder(callback);
+  const factory MaterialStateOutlineInputBorder.resolveWith(MaterialPropertyResolver<InputBorder> callback) = _MaterialStateOutlineInputBorder;
 
   /// Returns a [InputBorder] that's to be used when a Material component is in the
   /// specified state.
@@ -583,8 +578,7 @@ abstract class MaterialStateUnderlineInputBorder extends UnderlineInputBorder im
   ///
   /// The given callback parameter must return a non-null text style in the default
   /// state.
-  static MaterialStateUnderlineInputBorder resolveWith(MaterialPropertyResolver<InputBorder> callback) =>
-      _MaterialStateUnderlineInputBorder(callback);
+  const factory MaterialStateUnderlineInputBorder.resolveWith(MaterialPropertyResolver<InputBorder> callback) = _MaterialStateUnderlineInputBorder;
 
   /// Returns a [InputBorder] that's to be used when a Material component is in the
   /// specified state.

packages/flutter/lib/src/material/time.dart

@@ -64,7 +64,7 @@ class TimeOfDay {
   ///
   /// The [hour] is set to the current hour and the [minute] is set to the
   /// current minute in the local time zone.
-  factory TimeOfDay.now() { return TimeOfDay.fromDateTime(DateTime.now()); }
+  TimeOfDay.now() : this.fromDateTime(DateTime.now());
 
   /// The number of hours in one day, i.e. 24.
   static const int hoursPerDay = 24;

packages/flutter/lib/src/material/typography.dart

@@ -745,9 +745,7 @@ class Typography with Diagnosticable {
 // Design token database by the script:
 //   dev/tools/gen_defaults/bin/gen_defaults.dart.
 
-class _M3Typography {
-  _M3Typography._();
-
+abstract final class _M3Typography {
   static const TextTheme englishLike = TextTheme(
     displayLarge: TextStyle(debugLabel: 'englishLike displayLarge 2021', inherit: false, fontSize: 57.0, fontWeight: FontWeight.w400, letterSpacing: -0.25, height: 1.12, textBaseline: TextBaseline.alphabetic, leadingDistribution: TextLeadingDistribution.even),
     displayMedium: TextStyle(debugLabel: 'englishLike displayMedium 2021', inherit: false, fontSize: 45.0, fontWeight: FontWeight.w400, letterSpacing: 0.0, height: 1.16, textBaseline: TextBaseline.alphabetic, leadingDistribution: TextLeadingDistribution.even),

packages/flutter/lib/src/rendering/stack.dart

@@ -26,9 +26,11 @@ class RelativeRect {
   /// Creates a RelativeRect from a Rect and a Size. The Rect (first argument)
   /// and the RelativeRect (the output) are in the coordinate space of the
   /// rectangle described by the Size, with 0,0 being at the top left.
-  factory RelativeRect.fromSize(Rect rect, Size container) {
-    return RelativeRect.fromLTRB(rect.left, rect.top, container.width - rect.right, container.height - rect.bottom);
-  }
+  RelativeRect.fromSize(Rect rect, Size container)
+      : left = rect.left,
+        top = rect.top,
+        right = container.width - rect.right,
+        bottom = container.height - rect.bottom;
 
   /// Creates a RelativeRect from two Rects. The second Rect provides the
   /// container, the first provides the rectangle, in the same coordinate space,
@@ -42,14 +44,11 @@ class RelativeRect {
   /// If the first rect is actually in the container's coordinate space, then
   /// use [RelativeRect.fromSize] and pass the container's size as the second
   /// argument instead.
-  factory RelativeRect.fromRect(Rect rect, Rect container) {
-    return RelativeRect.fromLTRB(
-      rect.left - container.left,
-      rect.top - container.top,
-      container.right - rect.right,
-      container.bottom - rect.bottom,
-    );
-  }
+  RelativeRect.fromRect(Rect rect, Rect container)
+      : left = rect.left - container.left,
+        top = rect.top - container.top,
+        right = container.right - rect.right,
+        bottom = container.bottom - rect.bottom;
 
   /// Creates a RelativeRect from horizontal position using `start` and `end`
   /// rather than `left` and `right`.

packages/flutter/lib/src/rendering/table_border.dart

@@ -41,19 +41,16 @@ class TableBorder {
 
   /// Creates a border for a table where all the interior sides use the same
   /// styling and all the exterior sides use the same styling.
-  factory TableBorder.symmetric({
+  const TableBorder.symmetric({
     BorderSide inside = BorderSide.none,
     BorderSide outside = BorderSide.none,
-  }) {
-    return TableBorder(
-      top: outside,
-      right: outside,
-      bottom: outside,
-      left: outside,
-      horizontalInside: inside,
-      verticalInside: inside,
-    );
-  }
+    this.borderRadius = BorderRadius.zero,
+  }) : top = outside,
+       right = outside,
+       bottom = outside,
+       left = outside,
+       horizontalInside = inside,
+       verticalInside = inside;
 
   /// The top side of this border.
   final BorderSide top;

packages/flutter/lib/src/services/autofill.dart

@@ -13,11 +13,7 @@ export 'text_input.dart' show TextEditingValue, TextInputClient, TextInputConfig
 /// Each hint is pre-defined on at least one supported platform. See their
 /// documentation for their availability on each platform, and the platform
 /// values each autofill hint corresponds to.
-class AutofillHints {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  AutofillHints._();
-
+abstract final class AutofillHints {
   /// The input field expects an address locality (city/town).
   ///
   /// This hint will be translated to the below values on different platforms:

packages/flutter/lib/src/services/live_text.dart

@@ -12,11 +12,7 @@ import 'system_channels.dart';
 /// See also:
 ///  * <https://developer.apple.com/documentation/uikit/uiresponder/3778577-capturetextfromcamera>
 ///  * <https://support.apple.com/guide/iphone/use-live-text-iphcf0b71b0e/ios>
-class LiveText {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  LiveText._();
-
+abstract final class LiveText {
   /// Returns true if the Live Text input feature is available on the current device.
   static Future<bool> isLiveTextInputAvailable() async {
     final bool supportLiveTextInput =

packages/flutter/lib/src/services/mouse_cursor.dart

@@ -399,11 +399,7 @@ class SystemMouseCursor extends MouseCursor {
 /// The cursors should be named based on the cursors' use cases instead of their
 /// appearance, because different platforms might (although not commonly) use
 /// different shapes for the same use case.
-class SystemMouseCursors {
-  // This class only contains static members, and should not be instantiated or
-  // extended.
-  SystemMouseCursors._();
-
+abstract final class SystemMouseCursors {
   // The mapping in this class must be kept in sync with the following files in
   // the engine:
   //

packages/flutter/lib/src/services/text_formatter.dart

@@ -91,6 +91,10 @@ abstract class TextInputFormatter {
   /// This constructor enables subclasses to provide const constructors so that they can be used in const expressions.
   const TextInputFormatter();
 
+  /// A shorthand to creating a custom [TextInputFormatter] which formats
+  /// incoming text input changes with the given function.
+  const factory TextInputFormatter.withFunction(TextInputFormatFunction formatFunction) = _SimpleTextInputFormatter;
+
   /// Called when text is being typed or cut/copy/pasted in the [EditableText].
   ///
   /// You can override the resulting text based on the previous text value and
@@ -102,14 +106,6 @@ abstract class TextInputFormatter {
     TextEditingValue oldValue,
     TextEditingValue newValue,
   );
-
-  /// A shorthand to creating a custom [TextInputFormatter] which formats
-  /// incoming text input changes with the given function.
-  static TextInputFormatter withFunction(
-    TextInputFormatFunction formatFunction,
-  ) {
-    return _SimpleTextInputFormatter(formatFunction);
-  }
 }
 
 /// Function signature expected for creating custom [TextInputFormatter]
@@ -121,7 +117,7 @@ typedef TextInputFormatFunction = TextEditingValue Function(
 
 /// Wiring for [TextInputFormatter.withFunction].
 class _SimpleTextInputFormatter extends TextInputFormatter {
-  _SimpleTextInputFormatter(this.formatFunction);
+  const _SimpleTextInputFormatter(this.formatFunction);
 
   final TextInputFormatFunction formatFunction;
 

packages/flutter/lib/src/widgets/basic.dart

@@ -6763,10 +6763,8 @@ class RepaintBoundary extends SingleChildRenderObjectWidget {
   ///
   /// The key for the [RepaintBoundary] is derived either from the child's key
   /// (if the child has a non-null key) or from the given `childIndex`.
-  factory RepaintBoundary.wrap(Widget child, int childIndex) {
-    final Key key = child.key != null ? ValueKey<Key>(child.key!) : ValueKey<int>(childIndex);
-    return RepaintBoundary(key: key, child: child);
-  }
+  RepaintBoundary.wrap(Widget child, int childIndex)
+      : super(key: ValueKey<Object>(child.key ?? childIndex), child: child);
 
   /// Wraps each of the given children in [RepaintBoundary]s.
   ///
@@ -7557,16 +7555,11 @@ class IndexedSemantics extends SingleChildRenderObjectWidget {
 /// Useful for attaching a key to an existing widget.
 class KeyedSubtree extends StatelessWidget {
   /// Creates a widget that builds its child.
-  const KeyedSubtree({
-    super.key,
-    required this.child,
-  });
+  const KeyedSubtree({super.key, required this.child});
 
   /// Creates a KeyedSubtree for child with a key that's based on the child's existing key or childIndex.
-  factory KeyedSubtree.wrap(Widget child, int childIndex) {
-    final Key key = child.key != null ? ValueKey<Key>(child.key!) : ValueKey<int>(childIndex);
-    return KeyedSubtree(key: key, child: child);
-  }
+  KeyedSubtree.wrap(this.child, int childIndex)
+      : super(key: ValueKey<Object>(child.key ?? childIndex));
 
   /// The widget below this widget in the tree.
   ///

packages/flutter/lib/src/widgets/media_query.dart

@@ -190,7 +190,7 @@ class MediaQueryData {
     'This constructor was deprecated in preparation for the upcoming multi-window support. '
     'This feature was deprecated after v3.7.0-32.0.pre.'
   )
-  factory MediaQueryData.fromWindow(ui.FlutterView window) => MediaQueryData.fromView(window);
+  factory MediaQueryData.fromWindow(ui.FlutterView window) = MediaQueryData.fromView;
 
   /// Creates data for a [MediaQuery] based on the given `view`.
   ///
@@ -924,29 +924,23 @@ class MediaQuery extends InheritedModel<_MediaQueryAspect> {
   ///    adds a [Padding] widget.
   ///  * [MediaQueryData.padding], the affected property of the
   ///    [MediaQueryData].
-  ///  * [removeViewInsets], the same thing but for [MediaQueryData.viewInsets].
-  ///  * [removeViewPadding], the same thing but for
+  ///  * [MediaQuery.removeViewInsets], the same thing but for [MediaQueryData.viewInsets].
+  ///  * [MediaQuery.removeViewPadding], the same thing but for
   ///    [MediaQueryData.viewPadding].
-  factory MediaQuery.removePadding({
-    Key? key,
+  MediaQuery.removePadding({
+    super.key,
     required BuildContext context,
     bool removeLeft = false,
     bool removeTop = false,
     bool removeRight = false,
     bool removeBottom = false,
-    required Widget child,
-  }) {
-    return MediaQuery(
-      key: key,
-      data: MediaQuery.of(context).removePadding(
+    required super.child,
+  }) : data = MediaQuery.of(context).removePadding(
         removeLeft: removeLeft,
         removeTop: removeTop,
         removeRight: removeRight,
         removeBottom: removeBottom,
-      ),
-      child: child,
-    );
-  }
+      );
 
   /// Creates a new [MediaQuery] that inherits from the ambient [MediaQuery]
   /// from the given context, but removes the specified view insets.
@@ -966,29 +960,23 @@ class MediaQuery extends InheritedModel<_MediaQueryAspect> {
   ///
   ///  * [MediaQueryData.viewInsets], the affected property of the
   ///    [MediaQueryData].
-  ///  * [removePadding], the same thing but for [MediaQueryData.padding].
-  ///  * [removeViewPadding], the same thing but for
+  ///  * [MediaQuery.removePadding], the same thing but for [MediaQueryData.padding].
+  ///  * [MediaQuery.removeViewPadding], the same thing but for
   ///    [MediaQueryData.viewPadding].
-  factory MediaQuery.removeViewInsets({
-    Key? key,
+  MediaQuery.removeViewInsets({
+    super.key,
     required BuildContext context,
     bool removeLeft = false,
     bool removeTop = false,
     bool removeRight = false,
     bool removeBottom = false,
-    required Widget child,
-  }) {
-    return MediaQuery(
-      key: key,
-      data: MediaQuery.of(context).removeViewInsets(
+    required super.child,
+  }) : data = MediaQuery.of(context).removeViewInsets(
         removeLeft: removeLeft,
         removeTop: removeTop,
         removeRight: removeRight,
         removeBottom: removeBottom,
-      ),
-      child: child,
-    );
-  }
+      );
 
   /// Creates a new [MediaQuery] that inherits from the ambient [MediaQuery]
   /// from the given context, but removes the specified view padding.
@@ -1008,28 +996,22 @@ class MediaQuery extends InheritedModel<_MediaQueryAspect> {
   ///
   ///  * [MediaQueryData.viewPadding], the affected property of the
   ///    [MediaQueryData].
-  ///  * [removePadding], the same thing but for [MediaQueryData.padding].
-  ///  * [removeViewInsets], the same thing but for [MediaQueryData.viewInsets].
-  factory MediaQuery.removeViewPadding({
-    Key? key,
+  ///  * [MediaQuery.removePadding], the same thing but for [MediaQueryData.padding].
+  ///  * [MediaQuery.removeViewInsets], the same thing but for [MediaQueryData.viewInsets].
+  MediaQuery.removeViewPadding({
+    super.key,
     required BuildContext context,
     bool removeLeft = false,
     bool removeTop = false,
     bool removeRight = false,
     bool removeBottom = false,
-    required Widget child,
-  }) {
-    return MediaQuery(
-      key: key,
-      data: MediaQuery.of(context).removeViewPadding(
+    required super.child,
+  }) : data = MediaQuery.of(context).removeViewPadding(
         removeLeft: removeLeft,
         removeTop: removeTop,
         removeRight: removeRight,
         removeBottom: removeBottom,
-      ),
-      child: child,
-    );
-  }
+      );
 
   /// Deprecated. Use [MediaQuery.fromView] instead.
   ///

packages/flutter/lib/src/widgets/navigator.dart

@@ -5647,14 +5647,12 @@ class _NamedRestorationInformation extends _RestorationInformation {
     required this.restorationScopeId,
   }) : super(_RouteRestorationType.named);
 
-  factory _NamedRestorationInformation.fromSerializableData(List<Object?> data) {
-    assert(data.length >= 2);
-    return _NamedRestorationInformation(
-      restorationScopeId: data[0]! as int,
-      name: data[1]! as String,
-      arguments: data.length > 2 ? data[2] : null,
-    );
-  }
+  _NamedRestorationInformation.fromSerializableData(List<Object?> data)
+      : assert(data.length > 1),
+        restorationScopeId = data[0]! as int,
+        name = data[1]! as String,
+        arguments = data.elementAtOrNull(2),
+        super(_RouteRestorationType.named);
 
   @override
   List<Object> computeSerializableData() {
@@ -5685,15 +5683,12 @@ class _AnonymousRestorationInformation extends _RestorationInformation {
     required this.restorationScopeId,
   }) : super(_RouteRestorationType.anonymous);
 
-  factory _AnonymousRestorationInformation.fromSerializableData(List<Object?> data) {
-    assert(data.length > 1);
-    final RestorableRouteBuilder<Object?> routeBuilder = ui.PluginUtilities.getCallbackFromHandle(ui.CallbackHandle.fromRawHandle(data[1]! as int))! as RestorableRouteBuilder;
-    return _AnonymousRestorationInformation(
-      restorationScopeId: data[0]! as int,
-      routeBuilder: routeBuilder,
-      arguments: data.length > 2 ? data[2] : null,
-    );
-  }
+  _AnonymousRestorationInformation.fromSerializableData(List<Object?> data)
+      : assert(data.length > 1),
+        restorationScopeId = data[0]! as int,
+        routeBuilder = ui.PluginUtilities.getCallbackFromHandle(ui.CallbackHandle.fromRawHandle(data[1]! as int))! as RestorableRouteBuilder,
+        arguments = data.elementAtOrNull(2),
+        super(_RouteRestorationType.anonymous);
 
   @override
   // TODO(goderbauer): remove the kIsWeb check when https://github.com/flutter/flutter/issues/33615 is resolved.

packages/flutter/test/rendering/table_border_test.dart

@@ -44,9 +44,9 @@ void main() {
   });
 
   test('TableBorder.symmetric constructor', () {
-    final TableBorder border3 = TableBorder.symmetric(
-      inside: const BorderSide(width: 3.0),
-      outside: const BorderSide(color: Color(0xFFFF0000)),
+    const TableBorder border3 = TableBorder.symmetric(
+      inside: BorderSide(width: 3.0),
+      outside: BorderSide(color: Color(0xFFFF0000)),
     );
     expect(border3.top, const BorderSide(color: Color(0xFFFF0000)));
     expect(border3.right, const BorderSide(color: Color(0xFFFF0000)));
@@ -56,8 +56,8 @@ void main() {
     expect(border3.verticalInside, const BorderSide(width: 3.0));
     expect(border3.dimensions, const EdgeInsets.symmetric(horizontal: 1.0, vertical: 1.0));
     expect(border3.isUniform, isFalse);
-    expect(border3.scale(0.0), TableBorder.symmetric(
-      outside: const BorderSide(width: 0.0, color: Color(0xFFFF0000), style: BorderStyle.none),
+    expect(border3.scale(0.0), const TableBorder.symmetric(
+      outside: BorderSide(width: 0.0, color: Color(0xFFFF0000), style: BorderStyle.none),
     ));
   });
 

packages/flutter_driver/lib/src/common/layer_tree.dart

@@ -22,14 +22,12 @@ class LayerTree extends Result {
   /// Creates a [LayerTree] object with the given string representation.
   const LayerTree(this.tree);
 
+  /// Deserializes the result from JSON.
+  LayerTree.fromJson(Map<String, dynamic> json) : tree = json['tree'] as String;
+
   /// String representation of the layer tree.
   final String? tree;
 
-  /// Deserializes the result from JSON.
-  static LayerTree fromJson(Map<String, dynamic> json) {
-    return LayerTree(json['tree'] as String);
-  }
-
   @override
   Map<String, dynamic> toJson() => <String, dynamic>{
     'tree': tree,

packages/flutter_driver/lib/src/driver/refresh_rate_summarizer.dart

@@ -11,13 +11,9 @@ const String kUIThreadVsyncProcessEvent = 'VsyncProcessCallback';
 ///
 /// `RefreshRate` is the time between the start of a vsync pulse and the target time of that vsync.
 class RefreshRateSummary {
-
   /// Creates a [RefreshRateSummary] given the timeline events.
-  factory RefreshRateSummary({required List<TimelineEvent> vsyncEvents}) {
-    return RefreshRateSummary._(refreshRates: _computeRefreshRates(vsyncEvents));
-  }
-
-  RefreshRateSummary._({required List<double> refreshRates}) {
+  RefreshRateSummary({required List<TimelineEvent> vsyncEvents}) {
+    final List<double> refreshRates = _computeRefreshRates(vsyncEvents);
     _numberOfTotalFrames = refreshRates.length;
     for (final double refreshRate in refreshRates) {
       if ((refreshRate - 30).abs() < _kErrorMargin) {

packages/flutter_driver/lib/src/driver/timeline.dart

@@ -10,11 +10,7 @@ class Timeline {
   /// and loaded in Chrome for visual inspection.
   ///
   /// See https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview
-  factory Timeline.fromJson(Map<String, dynamic> json) {
-    return Timeline._(json, _parseEvents(json));
-  }
-
-  Timeline._(this.json, this.events);
+  Timeline.fromJson(this.json) : events = _parseEvents(json);
 
   /// The original timeline JSON.
   final Map<String, dynamic> json;

packages/flutter_test/lib/src/mock_event_channel.dart

@@ -16,14 +16,14 @@ import 'package:flutter/services.dart';
 /// - [MockStreamHandlerEventSink.endOfStream] sends an end of stream event.
 abstract class MockStreamHandler {
   /// Create a new [MockStreamHandler].
-  MockStreamHandler();
+  const MockStreamHandler();
 
   /// Create a new inline [MockStreamHandler] with the given [onListen] and
   /// [onCancel] handlers.
-  factory MockStreamHandler.inline({
+  const factory MockStreamHandler.inline({
     required MockStreamHandlerOnListenCallback onListen,
     MockStreamHandlerOnCancelCallback? onCancel,
-  }) => _InlineMockStreamHandler(onListen: onListen, onCancel: onCancel);
+  }) = _InlineMockStreamHandler;
 
   /// Handler for the listen event.
   void onListen(Object? arguments, MockStreamHandlerEventSink events);
@@ -39,7 +39,7 @@ typedef MockStreamHandlerOnListenCallback = void Function(Object? arguments, Moc
 typedef MockStreamHandlerOnCancelCallback = void Function(Object? arguments);
 
 class _InlineMockStreamHandler extends MockStreamHandler {
-  _InlineMockStreamHandler({
+  const _InlineMockStreamHandler({
     required MockStreamHandlerOnListenCallback onListen,
     MockStreamHandlerOnCancelCallback? onCancel,
   })  : _onListenInline = onListen,

packages/flutter_tools/lib/src/base/io.dart

@@ -387,9 +387,9 @@ class Stdio {
 
 /// An overridable version of io.ProcessInfo.
 abstract class ProcessInfo {
-  factory ProcessInfo(FileSystem fs) => _DefaultProcessInfo(fs);
+  factory ProcessInfo(FileSystem fs) = _DefaultProcessInfo;
 
-  factory ProcessInfo.test(FileSystem fs) => _TestProcessInfo(fs);
+  factory ProcessInfo.test(FileSystem fs) = _TestProcessInfo;
 
   int get currentRss;
 

packages/flutter_tools/lib/src/base/process.dart

@@ -25,12 +25,10 @@ typedef ShutdownHook = FutureOr<void> Function();
 // for more details.
 
 abstract class ShutdownHooks {
-  factory ShutdownHooks() => _DefaultShutdownHooks();
+  factory ShutdownHooks() = _DefaultShutdownHooks;
 
   /// Registers a [ShutdownHook] to be executed before the VM exits.
-  void addShutdownHook(
-    ShutdownHook shutdownHook
-  );
+  void addShutdownHook(ShutdownHook shutdownHook);
 
   @visibleForTesting
   List<ShutdownHook> get registeredHooks;
@@ -139,10 +137,7 @@ abstract class ProcessUtils {
   factory ProcessUtils({
     required ProcessManager processManager,
     required Logger logger,
-  }) => _DefaultProcessUtils(
-    processManager: processManager,
-    logger: logger,
-  );
+  }) = _DefaultProcessUtils;
 
   /// Spawns a child process to run the command [cmd].
   ///

packages/flutter_tools/lib/src/base/utils.dart

@@ -152,9 +152,7 @@ class SettingsFile {
     }
   }
 
-  factory SettingsFile.parseFromFile(File file) {
-    return SettingsFile.parse(file.readAsStringSync());
-  }
+  SettingsFile.parseFromFile(File file) : this.parse(file.readAsStringSync());
 
   final Map<String, String> values = <String, String>{};
 

packages/flutter_tools/lib/src/build_system/targets/dart_plugin_registrant.dart

@@ -22,11 +22,7 @@ class DartPluginRegistrantTarget extends Target {
   ///
   /// If `project` is unset, a [FlutterProject] based on environment is used.
   @visibleForTesting
-  factory DartPluginRegistrantTarget.test(FlutterProject project) {
-    return DartPluginRegistrantTarget._(project);
-  }
-
-  DartPluginRegistrantTarget._(this._project);
+  const DartPluginRegistrantTarget.test(FlutterProject project) : _project = project;
 
   final FlutterProject? _project;
 

packages/flutter_tools/lib/src/debug_adapters/flutter_adapter_args.dart

@@ -42,8 +42,7 @@ class FlutterAttachRequestArguments
         program = obj['program'] as String?,
         super.fromMap();
 
-  static FlutterAttachRequestArguments fromJson(Map<String, Object?> obj) =>
-      FlutterAttachRequestArguments.fromMap(obj);
+  factory FlutterAttachRequestArguments.fromJson(Map<String, Object?> obj) = FlutterAttachRequestArguments.fromMap;
 
   /// Arguments to be passed to the tool that will run [program] (for example, the VM or Flutter tool).
   final List<String>? toolArgs;
@@ -128,6 +127,8 @@ class FlutterLaunchRequestArguments
         customToolReplacesArgs = obj['customToolReplacesArgs'] as int?,
         super.fromMap();
 
+  factory FlutterLaunchRequestArguments.fromJson(Map<String, Object?> obj) = FlutterLaunchRequestArguments.fromMap;
+
   /// If noDebug is true the launch request should launch the program without enabling debugging.
   @override
   final bool? noDebug;
@@ -170,7 +171,4 @@ class FlutterLaunchRequestArguments
         if (customToolReplacesArgs != null)
           'customToolReplacesArgs': customToolReplacesArgs,
       };
-
-  static FlutterLaunchRequestArguments fromJson(Map<String, Object?> obj) =>
-      FlutterLaunchRequestArguments.fromMap(obj);
 }

packages/flutter_tools/lib/src/fuchsia/fuchsia_pm.dart

@@ -167,12 +167,8 @@ class FuchsiaPM {
 ///   server.stop();
 /// }
 class FuchsiaPackageServer {
-  factory FuchsiaPackageServer(
-      String repo, String name, String host, int port) {
-    return FuchsiaPackageServer._(repo, name, host, port);
-  }
-
-  FuchsiaPackageServer._(this._repo, this.name, this._host, this._port);
+  FuchsiaPackageServer(String repo, this.name, String host, int port)
+      : _repo = repo, _host = host, _port = port;
 
   static const String deviceHost = 'fuchsia.com';
   static const String toolHost = 'flutter-tool';

packages/flutter_tools/lib/src/persistent_tool_state.dart

@@ -18,19 +18,12 @@ abstract class PersistentToolState {
     required FileSystem fileSystem,
     required Logger logger,
     required Platform platform,
-  }) => _DefaultPersistentToolState(
-    fileSystem: fileSystem,
-    logger: logger,
-    platform: platform,
-  );
+  }) = _DefaultPersistentToolState;
 
   factory PersistentToolState.test({
     required Directory directory,
     required Logger logger,
-  }) => _DefaultPersistentToolState.test(
-    directory: directory,
-    logger: logger,
-  );
+  }) = _DefaultPersistentToolState.test;
 
   static PersistentToolState? get instance => context.get<PersistentToolState>();
 

packages/flutter_tools/lib/src/platform_plugins.dart

@@ -84,19 +84,14 @@ class AndroidPlugin extends PluginPlatform implements NativeOrDartPlugin {
   })  : _fileSystem = fileSystem,
         ffiPlugin = ffiPlugin ?? false;
 
-  factory AndroidPlugin.fromYaml(String name, YamlMap yaml, String pluginPath, FileSystem fileSystem) {
-    assert(validate(yaml));
-    return AndroidPlugin(
-      name: name,
-      package: yaml['package'] as String?,
-      pluginClass: yaml[kPluginClass] as String?,
-      dartPluginClass: yaml[kDartPluginClass] as String?,
-      ffiPlugin: yaml[kFfiPlugin] as bool?,
-      defaultPackage: yaml[kDefaultPackage] as String?,
-      pluginPath: pluginPath,
-      fileSystem: fileSystem,
-    );
-  }
+  AndroidPlugin.fromYaml(this.name, YamlMap yaml, this.pluginPath, FileSystem fileSystem)
+      : assert(validate(yaml)),
+        package = yaml['package'] as String?,
+        pluginClass = yaml[kPluginClass] as String?,
+        dartPluginClass = yaml[kDartPluginClass] as String?,
+        ffiPlugin = yaml[kFfiPlugin] as bool? ?? false,
+        defaultPackage = yaml[kDefaultPackage] as String?,
+        _fileSystem = fileSystem;
 
   final FileSystem _fileSystem;
 
@@ -244,18 +239,14 @@ class IOSPlugin extends PluginPlatform implements NativeOrDartPlugin, DarwinPlug
   }) : ffiPlugin = ffiPlugin ?? false,
        sharedDarwinSource = sharedDarwinSource ?? false;
 
-  factory IOSPlugin.fromYaml(String name, YamlMap yaml) {
-    assert(validate(yaml)); // TODO(zanderso): https://github.com/flutter/flutter/issues/67241
-    return IOSPlugin(
-      name: name,
-      classPrefix: '',
-      pluginClass: yaml[kPluginClass] as String?,
-      dartPluginClass: yaml[kDartPluginClass] as String?,
-      ffiPlugin: yaml[kFfiPlugin] as bool?,
-      defaultPackage: yaml[kDefaultPackage] as String?,
-      sharedDarwinSource: yaml[kSharedDarwinSource] as bool?,
-    );
-  }
+  IOSPlugin.fromYaml(this.name, YamlMap yaml)
+      : assert(validate(yaml)), // TODO(zanderso): https://github.com/flutter/flutter/issues/67241
+        classPrefix = '',
+        pluginClass = yaml[kPluginClass] as String?,
+        dartPluginClass = yaml[kDartPluginClass] as String?,
+        ffiPlugin = yaml[kFfiPlugin] as bool? ?? false,
+        defaultPackage = yaml[kDefaultPackage] as String?,
+        sharedDarwinSource = yaml[kSharedDarwinSource] as bool? ?? false;
 
   static bool validate(YamlMap yaml) {
     return yaml[kPluginClass] is String ||
@@ -321,22 +312,14 @@ class MacOSPlugin extends PluginPlatform implements NativeOrDartPlugin, DarwinPl
   }) : ffiPlugin = ffiPlugin ?? false,
        sharedDarwinSource = sharedDarwinSource ?? false;
 
-  factory MacOSPlugin.fromYaml(String name, YamlMap yaml) {
-    assert(validate(yaml));
-    // Treat 'none' as not present. See https://github.com/flutter/flutter/issues/57497.
-    String? pluginClass = yaml[kPluginClass] as String?;
-    if (pluginClass == 'none') {
-      pluginClass = null;
-    }
-    return MacOSPlugin(
-      name: name,
-      pluginClass: pluginClass,
-      dartPluginClass: yaml[kDartPluginClass] as String?,
-      ffiPlugin: yaml[kFfiPlugin] as bool?,
-      defaultPackage: yaml[kDefaultPackage] as String?,
-      sharedDarwinSource: yaml[kSharedDarwinSource] as bool?,
-    );
-  }
+  MacOSPlugin.fromYaml(this.name, YamlMap yaml)
+      : assert(validate(yaml)),
+        // Treat 'none' as not present. See https://github.com/flutter/flutter/issues/57497.
+        pluginClass = yaml[kPluginClass] == 'none' ? null : yaml[kPluginClass] as String?,
+        dartPluginClass = yaml[kDartPluginClass] as String?,
+        ffiPlugin = yaml[kFfiPlugin] as bool? ?? false,
+        defaultPackage = yaml[kDefaultPackage] as String?,
+        sharedDarwinSource = yaml[kSharedDarwinSource] as bool? ?? false;
 
   static bool validate(YamlMap yaml) {
     return yaml[kPluginClass] is String ||
@@ -487,21 +470,13 @@ class LinuxPlugin extends PluginPlatform implements NativeOrDartPlugin {
   })  : ffiPlugin = ffiPlugin ?? false,
         assert(pluginClass != null || dartPluginClass != null || (ffiPlugin ?? false) || defaultPackage != null);
 
-  factory LinuxPlugin.fromYaml(String name, YamlMap yaml) {
-    assert(validate(yaml));
-    // Treat 'none' as not present. See https://github.com/flutter/flutter/issues/57497.
-    String? pluginClass = yaml[kPluginClass] as String?;
-    if (pluginClass == 'none') {
-      pluginClass = null;
-    }
-    return LinuxPlugin(
-      name: name,
-      pluginClass: pluginClass,
-      dartPluginClass: yaml[kDartPluginClass] as String?,
-      ffiPlugin: yaml[kFfiPlugin] as bool?,
-      defaultPackage: yaml[kDefaultPackage] as String?,
-    );
-  }
+  LinuxPlugin.fromYaml(this.name, YamlMap yaml)
+      : assert(validate(yaml)),
+        // Treat 'none' as not present. See https://github.com/flutter/flutter/issues/57497.
+        pluginClass = yaml[kPluginClass] == 'none' ? null : yaml[kPluginClass] as String?,
+        dartPluginClass = yaml[kDartPluginClass] as String?,
+        ffiPlugin = yaml[kFfiPlugin] as bool? ?? false,
+        defaultPackage = yaml[kDefaultPackage] as String?;
 
   static bool validate(YamlMap yaml) {
     return yaml[kPluginClass] is String ||

packages/flutter_tools/lib/src/pre_run_validator.dart

@@ -8,9 +8,7 @@ import 'cache.dart';
 
 /// A validator that runs before the tool runs any command.
 abstract class PreRunValidator {
-  factory PreRunValidator({
-    required FileSystem fileSystem,
-  }) => _DefaultPreRunValidator(fileSystem: fileSystem);
+  factory PreRunValidator({required FileSystem fileSystem}) = _DefaultPreRunValidator;
 
   void validate();
 }

packages/flutter_tools/lib/src/proxied_devices/file_transfer.dart

@@ -15,7 +15,7 @@ import '../convert.dart';
 
 /// Adler-32 and MD5 hashes of blocks in files.
 class BlockHashes {
-  BlockHashes({
+  const BlockHashes({
     required this.blockSize,
     required this.totalSize,
     required this.adler32,
@@ -23,6 +23,13 @@ class BlockHashes {
     required this.fileMd5,
   });
 
+  BlockHashes.fromJson(Map<String, Object?> obj)
+      : blockSize = obj['blockSize']! as int,
+        totalSize = obj['totalSize']! as int,
+        adler32 = Uint32List.view(base64.decode(obj['adler32']! as String).buffer),
+        md5 = (obj['md5']! as List<Object?>).cast<String>(),
+        fileMd5 = obj['fileMd5']! as String;
+
   /// The block size used to generate the hashes.
   final int blockSize;
 
@@ -45,16 +52,6 @@ class BlockHashes {
     'md5': md5,
     'fileMd5': fileMd5,
   };
-
-  static BlockHashes fromJson(Map<String, Object?> obj) {
-    return BlockHashes(
-      blockSize: obj['blockSize']! as int,
-      totalSize: obj['totalSize']! as int,
-      adler32: Uint32List.view(base64.decode(obj['adler32']! as String).buffer),
-      md5: (obj['md5']! as List<Object?>).cast<String>(),
-      fileMd5: obj['fileMd5']! as String,
-    );
-  }
 }
 
 /// Converts a stream of bytes, into a stream of bytes of fixed chunk size.

packages/flutter_tools/test/general.shard/proxied_devices/proxied_devices_test.dart

@@ -431,7 +431,7 @@ void main() {
       testWithoutContext('transfers file to the daemon with delta turned on, file exists on remote', () async {
         bufferLogger = BufferLogger.test();
         final FakeFileTransfer fileTransfer = FakeFileTransfer();
-        final BlockHashes blockHashes = BlockHashes(
+        const BlockHashes blockHashes = BlockHashes(
           blockSize: 10,
           totalSize: 30,
           adler32: <int>[1, 2, 3],