Roll src/third_party/dart 6e53ac6e4c7b..5a965d5d0fef (2 commits) (#17476)

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': '6e53ac6e4c7b3d94de5ee0370a538b03dafded1c',
+  'dart_revision': '5a965d5d0fef5ee17cbf3dcde94570fe1d6f0b94',
 
   # 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: 5b3f003586ed2be66f2d786535f46b98
+Signature: f5bf65965fda85309d68bec5dbe382e7
 
 UNUSED LICENSES: