Roll src/third_party/dart c6db98667aa6..245a574301b1 (3 commits) (#18294)

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': 'c6db98667aa67231d10d81c65b1640d4ef27a5ce',
+  'dart_revision': '245a574301b1de35541a8184567a780004450900',
 
   # 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: 276baedd256f7d4fdf83e8afc14f8112
+Signature: 089dab6122ec08141d4ab4892d697b32
 
 UNUSED LICENSES: