Roll Dart SDK from 4693d6d4f88e to b77641194368 (3 revisions) (#24836)

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': '4693d6d4f88e5e94ad9916e9d085514f7ff882e4',
+  'dart_revision': 'b77641194368f747c74cc935ce1b550b00ec9b2f',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_third_party

-Signature: b5f00a9a7a489c85511d83863985c149
+Signature: 52df640fea1178fa617c339f9dc23a09
 
 UNUSED LICENSES: