Roll Dart SDK from 220698d69c17 to 1294984fe017 (1 revision) (#35564)

DEPS

diff --git a/DEPS b/DEPS
index bfb202d..aaae081 100644
--- a/DEPS
+++ b/DEPS
@@ -36,7 +36,7 @@
   # 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': '220698d69c1737184658dd513f567d795909f8f4',
+  'dart_revision': '1294984fe017fb73436f6c242bef348caf000b1e',
 
   # 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

diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index 5484922..5e07b4a 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: 08d3ae27d4967d586a61824c57e6b876
+Signature: db11b54b3a25ad4da814f689d36f93af
 
 UNUSED LICENSES: