'Update Dart SDK to 0cc2dddef12a1d63d08f993b63667623e584b459' (#26941)

diff --git a/DEPS b/DEPS
index bbdd7e4..ce67231 100644
--- a/DEPS
+++ b/DEPS
@@ -35,7 +35,7 @@
   # 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': 'bd5cd8a65baf2cdad8f5ba9b350c4e912d2a6cdf',
+  'dart_revision': '0cc2dddef12a1d63d08f993b63667623e584b459',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py