Roll Dart SDK from b966487154ae to 73641e1ef4f2 (2 revisions) (#167723)

https://dart.googlesource.com/sdk.git/+log/b966487154ae..73641e1ef4f2

2025-04-24 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com
Version 3.9.0-51.0.dev
2025-04-24 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com
Version 3.9.0-50.0.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 chinmaygarde@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

@@ -56,7 +56,7 @@ 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': 'b966487154ae0abab3d34cfe457f3e8a79a18fce',
+  'dart_revision': '73641e1ef4f26863958453568facdfb3e4c56371',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -371,7 +371,7 @@ deps = {
    Var('dart_git') + '/external/github.com/google/webkit_inspection_protocol.dart.git' + '@' + Var('dart_webkit_inspection_protocol_rev'),
 
   'engine/src/flutter/third_party/dart/tools/sdks/dart-sdk':
-   {'dep_type': 'cipd', 'packages': [{'package': 'dart/dart-sdk/${{platform}}', 'version': 'git_revision:5a8921e0042c662ea2adbac35ea051dec20a5341'}]},
+   {'dep_type': 'cipd', 'packages': [{'package': 'dart/dart-sdk/${{platform}}', 'version': 'git_revision:4bb26ad346b166d759773e01ffc8247893b9681e'}]},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.
 

engine/src/flutter/sky/packages/sky_engine/LICENSE

@@ -30447,7 +30447,7 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
   This Source Code Form is "Incompatible With Secondary Licenses", as
   defined by the Mozilla Public License, v. 2.0.
 
-You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/b966487154ae0abab3d34cfe457f3e8a79a18fce
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/73641e1ef4f26863958453568facdfb3e4c56371
 /third_party/fallback_root_certificates/
 
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