Roll Dart SDK from 2ec59f6c0e47 to e4125ef075e6 (1 revision) (#27237)

diff --git a/DEPS b/DEPS
index 537641a..53000e0 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': '2ec59f6c0e47feec23d8a60009cb713fbc098ef9',
+  'dart_revision': 'e4125ef075e654e8f4f20609eb26a6e409d3e8a7',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index d7fb201..f65bdfd 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: ade92f8568ec1f49d1f72195bde95320
+Signature: 600cc7c95e818f66ad7a48c74ce556c8
 
 UNUSED LICENSES: