Roll Dart SDK from 1046888b1bf9 to c45c07592a95 (4 revisions) (#19086)

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': '1046888b1bf9adf61c0c3e8929d2d29cc6c8dd83',
+  'dart_revision': 'c45c07592a95eeb7eabf8b668e9ded844d73422a',
 
   # 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: 42713ca6f6e94962450f22c2d5a19433
+Signature: 3f40fc4c7e9910b207eb6d2ccf924dc5
 
 UNUSED LICENSES: