Roll Dart SDK from 53c099432d41 to 16b293c42139 (1 revision) (flutter#178367)

https://dart.googlesource.com/sdk.git/+log/53c099432d41..16b293c42139

2025-11-12 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com
Version 3.11.0-125.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter
Please CC aaclarke@google.com,dart-vm-team@google.com on the revert to
ensure that a human
is aware of the problem.

To file a bug in Flutter:
https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: engine-flutter-autoroll

DEPS

@@ -57,7 +57,7 @@ vars = {
   # 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': '53c099432d412895078bf52c70356400a030c384',
+  'dart_revision': '16b293c421393a3ba572a1d2eac1ba37c16d7fd1',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -312,7 +312,7 @@ deps = {
    Var('dart_git') + '/core.git' + '@' + Var('dart_core_rev'),
 
   'engine/src/flutter/third_party/dart/third_party/pkg/dart_style':
-   Var('dart_git') + '/dart_style.git@ca019b0498692ad78f5f0f0f6208a1258e17fc90',
+   Var('dart_git') + '/dart_style.git@de7e7260b81a4d4e2475c37faf0e89b83454dfdb',
 
   'engine/src/flutter/third_party/dart/third_party/pkg/dartdoc':
    Var('dart_git') + '/dartdoc.git@6d1aa6f5045c33d3723aba05e3e0dc1403b763c0',