Roll Dart SDK from 83365979ea85 to e41a6008746d (1 revision) (flutter#21224)

Author: skia-flutter-autoroll

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': '83365979ea856fd8c755be7ee0b9a4dae0fb8db5',
+  'dart_revision': 'e41a6008746de7948099ab58195f8ff58e12e31e',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py