Roll Dart SDK from 71a854679d60 to 366200db1aa1 (2 revisions) (#181227)

https://dart.googlesource.com/sdk.git/+log/71a854679d60..366200db1aa1

2026-01-21 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com
Version 3.12.0-51.0.dev
2026-01-20 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com
Version 3.12.0-50.0.dev

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diff --git a/DEPS b/DEPS
index c9b41bc..9d53d9f 100644
--- a/DEPS
+++ b/DEPS
@@ -59,7 +59,7 @@
   # updated revision list of existing dependencies. You will need to
   # gclient sync before and after update deps to ensure all deps are updated.
   # updated revision list of existing dependencies.
-  'dart_revision': '71a854679d60630bc8c94bbbbac7336f4d4f8a49',
+  'dart_revision': '366200db1aa197caafa32ceab1ceefef0ccf73e6',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -332,7 +332,7 @@
    Var('dart_git') + '/leak_tracker.git@f5620600a5ce1c44f65ddaa02001e200b096e14c',
 
   'engine/src/flutter/third_party/dart/third_party/pkg/native':
-   Var('dart_git') + '/native.git@c4f419cfc091aaa7bc7ce9e84ac49bc752e87b02',
+   Var('dart_git') + '/native.git@2f33e1af716668ab79346fdded6fa3f05ffd827b',
 
   'engine/src/flutter/third_party/dart/third_party/pkg/protobuf':
    Var('dart_git') + '/protobuf.git' + '@' + Var('dart_protobuf_rev'),