Roll Dart SDK from d2df2ba0b843 to 9d3b9460df97 (1 revision) (flutter#34636)

Author: skia-flutter-autoroll

DEPS

@@ -35,7 +35,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'd2df2ba0b8435275c42cd980e835c770ca962193',
+  'dart_revision': '9d3b9460df974bb49c42ecd132a7de0cab498209',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py