Roll Dart SDK from 64a5583ffbc9 to 8f22201e4050 (6 revisions) (#24907)

DEPS

@@ -35,7 +35,7 @@ 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': '64a5583ffbc920080d1cc04c316d8a949f0ea317',
+  'dart_revision': '8f22201e40507738474d1e83a9f2dc552b0448a4',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -315,7 +315,7 @@ deps = {
    Var('dart_git') + '/term_glyph.git@6a0f9b6fb645ba75e7a00a4e20072678327a0347',
 
   'src/third_party/dart/third_party/pkg/test':
-   Var('dart_git') + '/test.git@bb98af3d17a821c28488ef8e2881e3ca173baf94',
+   Var('dart_git') + '/test.git@2cd8a4e774439447b01f9d381da020319a9808d8',
 
   'src/third_party/dart/third_party/pkg/test_reflective_loader':
    Var('dart_git') + '/test_reflective_loader.git@54e930a11c372683792e22bddad79197728c91ce',
@@ -342,7 +342,7 @@ deps = {
    Var('dart_git') + '/package_config.git@249af482de9ebabfc781bf10d6152c938e5ce45e',
 
   'src/third_party/dart/tools/sdks':
-   {'packages': [{'version': 'version:2.12.0-259.8.beta', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
+   {'packages': [{'version': 'version:2.12.0', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.
 

ci/licenses_golden/licenses_third_party

-Signature: 52df640fea1178fa617c339f9dc23a09
+Signature: f81eba1beda39442f061c39819cf7e77
 
 UNUSED LICENSES: