Roll Dart SDK from 4fb134a228c7 to db7eb2549480 (1 revision) (flutter#21426)

Author: skia-flutter-autoroll

DEPS

@@ -34,7 +34,7 @@ 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': '4fb134a228c76c6b4e5a8700340c6c54022ea7ec',
+  'dart_revision': 'db7eb25494806f376dfdb4a74e76b3812231ea8b',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -205,7 +205,7 @@ deps = {
    Var('dart_git') + '/glob.git@e9f4e6b7ae8abe5071461cf8f47191bb19cf7ef6',
 
   'src/third_party/dart/third_party/pkg/html':
-   Var('dart_git') + '/html.git@083a36cd801a4b787ba156b7c6e4c8b2e2daed4a',
+   Var('dart_git') + '/html.git@22f17e97fedeacaa1e945cf84d8016284eed33a6',
 
   'src/third_party/dart/third_party/pkg/http':
    Var('dart_git') + '/http.git@7b55a2c62a5f6fb680ad7a4607bab7281a235563',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 6cffd19e8a014087118240e7ee836c22
+Signature: e5f89badc9a2edd1723c923556a3712d
 
 UNUSED LICENSES: