Roll Dart SDK from a3b62f3 to 4226116 (1 revision) (#21830)

Author: skia-flutter-autoroll

DEPS

@@ -34,14 +34,14 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'a3b62f366529dbe4e4e75b73124bc59581ce6428',
+  'dart_revision': '4226116043f5ea5301b11474e0a97706132c317b',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
   'dart_args_tag': '1.6.0',
   'dart_boringssl_gen_rev': '429ccb1877f7987a6f3988228bc2440e61293499',
   'dart_boringssl_rev': '4dfd5af70191b068aebe567b8e29ce108cee85ce',
-  'dart_collection_rev': '52e219581f72a3eac013d6f5550c580962677425',
+  'dart_collection_rev': '7d44763d62f97698b15c08ee360d838dccb63c88',
   'dart_dart_style_tag': '1.3.7',
   'dart_http_retry_tag': '0.1.1',
   'dart_http_throttle_tag': '1.0.2',
@@ -66,7 +66,7 @@ vars = {
   'dart_tflite_native_rev': '0.4.0+1',
   'dart_typed_data_tag': 'f94fc57b8e8c0e4fe4ff6cfd8290b94af52d3719',
   'dart_usage_tag': '3.4.0',
-  'dart_watcher_rev': 'fc3c9aae5d31d707b3013b42634dde8d8a1161b4',
+  'dart_watcher_rev': '5df2e364b0c3ec12b9ed9cf2eedb71f9ddf8b7cd',
 
   'ocmock_tag': 'v3.7.1',
 
@@ -175,7 +175,7 @@ deps = {
    Var('dart_git') + '/charcode.git@4a685faba42d86ebd9d661eadd1e79d0a1c34c43',
 
   'src/third_party/dart/third_party/pkg/cli_util':
-   Var('dart_git') + '/cli_util.git@0.2.0',
+   Var('dart_git') + '/cli_util.git@335ed165887d0ec97c2a09173ebf22dcf56a6c4e',
 
   'src/third_party/dart/third_party/pkg/collection':
    Var('dart_git') + '/collection.git' + '@' + Var('dart_collection_rev'),