Roll Dart SDK from 746879714c96 to d53eb1066384 (2 revisions) (flutter#27432)

Author: skia-flutter-autoroll

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': '746879714c967780cf4dfd8f30918a7d462fdde4',
+  'dart_revision': 'd53eb1066384afdafbbb2d752a7b82389a41cd27',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -328,7 +328,7 @@ deps = {
    Var('dart_git') + '/term_glyph.git@6a0f9b6fb645ba75e7a00a4e20072678327a0347',
 
   'src/third_party/dart/third_party/pkg/test':
-   Var('dart_git') + '/test.git@030816c32b6fe78d5fb7653afbd9f63cca18bacf',
+   Var('dart_git') + '/test.git@099dcc4d052a30c6921489cfbefa1c8531d12975',
 
   'src/third_party/dart/third_party/pkg/test_reflective_loader':
    Var('dart_git') + '/test_reflective_loader.git@54e930a11c372683792e22bddad79197728c91ce',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: f431a32022da7478219c9561ef882bac
+Signature: 871bddca81b46b2e6144e8e29fad62b7
 
 UNUSED LICENSES: