Update checked-in Dart SDK to 2.0.0-dev.64.1

Change-Id: Id4e8f4987f830a4f81fbb4d70afeeb68b3babd67
Reviewed-on: https://dart-review.googlesource.com/61521
Reviewed-by: Zach Anderson <zra@google.com>

tools/observatory_tool.py

@@ -179,6 +179,7 @@ def Build(dart_executable,
     if not silent:
       DisplayBootstrapWarning()
     command = [dart_executable, DART2JS_PATH]
+  command += ['--no-preview-dart-2']
   command += ['-DOBS_VER=' + utils.GetVersion(no_git_hash=True)]
   command += [script_path, '-o', output_path, '--packages=%s' % packages_path]
   # Add the defaults pub used

tools/sdks/linux/dart-sdk.tar.gz.sha1

@@ -1 +1 @@
-2abdfae6bf237e3d10e7d6e7680e62653c59f167
+cb26a440fbe1a3cef64c580ee9055a746278ea82

tools/sdks/mac/dart-sdk.tar.gz.sha1

@@ -1 +1 @@
-e2d609d355ce8e8a0de9dc107818055fead5c6c1
+c66ec04f2b2e00c30b307eb2275a2bd91fa97287

tools/sdks/win/dart-sdk.tar.gz.sha1

@@ -1 +1 @@
-c5cca53d8fa715c6409eca288cd5560d55d50bdc
+26a6441397eea6cf00c7b3e565de4aa40c43a9c6

tools/test.py

@@ -16,8 +16,7 @@ def Main():
   tools_dir = os.path.dirname(os.path.realpath(__file__))
   dart_test_script = string.join(
       [tools_dir, 'testing', 'dart', 'main.dart'], os.sep)
-  command = [utils.CheckedInSdkExecutable(),
-             '--checked', dart_test_script] + args
+  command = [utils.CheckedInSdkExecutable(), dart_test_script] + args
 
   # The testing script potentially needs the android platform tools in PATH so
   # we do that in ./tools/test.py (a similar logic exists in ./tools/build.py).

utils/dartdevc/BUILD.gn

@@ -130,8 +130,6 @@ dart2js_compile("stack_trace_mapper") {
 # Apply dev_compiler's patch files to create the Dart version of the dartdevc
 # SDK.
 prebuilt_dart_action("dartdevc_patch_sdk") {
-  vm_args = ["--preview-dart-2"]
-
   # TODO(rnystrom): Unfork DDC's patch_sdk.dart script with the
   # tools/patch_sdk.dart and then change this to use generate_patch_sdk().
   deps = [
@@ -173,8 +171,6 @@ prebuilt_dart_action("dartdevc_patch_sdk") {
 # Compiles the Dart core libraries and DDC runtime to an analyzer summary and
 # JS.
 prebuilt_dart_action("dartdevc_sdk") {
-  vm_args = ["--preview-dart-2"]
-
   deps = [
     ":dartdevc_files_stamp",
     ":dartdevc_patch_sdk",
@@ -271,8 +267,6 @@ create_timestamp_file("dartdevc_sdk_patch_stamp") {
 # Compiles the packages used by the tests to JS with dartdevc so that they are
 # available for loading by the tests.
 prebuilt_dart_action("dartdevc_test_pkg") {
-  vm_args = ["--preview-dart-2"]
-
   deps = [
     ":dartdevc_files_stamp",
     ":dartdevc_sdk",
@@ -334,8 +328,6 @@ prebuilt_dart_action("dartdevc_test_pkg") {
 
 # Compiles the DDC SDK's kernel summary and JS code.
 prebuilt_dart_action("dartdevk_sdk") {
-  vm_args = ["--preview-dart-2"]
-
   deps = [
     "../../pkg:pkg_files_stamp",
     ":dartdevc_files_stamp",