Roll Dart SDK from 69ef0e9b3570 to 4d83ab20df11 (1 revision) (#49420)

https://dart.googlesource.com/sdk.git/+log/69ef0e9b3570..4d83ab20df11

2023-12-29 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.3.0-271.0.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-engine
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 Engine: 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

DEPS

@@ -66,7 +66,7 @@ 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': '69ef0e9b35709ecb8117a7c65cb2e47626a7b26d',
+  'dart_revision': '4d83ab20df11490831d865f30d91e42a166298cf',
 
   # 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_dart

@@ -1,4 +1,4 @@
-Signature: 78dfd250a9047bd87ee1e886dcd683e3
+Signature: 899f3da3057710fca5d0354c247787bb
 
 ====================================================================================================
 LIBRARY: dart
@@ -4707,7 +4707,7 @@ 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/+/a95d7384db936d13fc6477dd809332f0e1f89642
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/4d83ab20df11490831d865f30d91e42a166298cf
 /third_party/fallback_root_certificates/
 
 ====================================================================================================

sky/packages/sky_engine/LICENSE

@@ -31145,7 +31145,7 @@ 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/+/a95d7384db936d13fc6477dd809332f0e1f89642
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/4d83ab20df11490831d865f30d91e42a166298cf
 /third_party/fallback_root_certificates/
 
 --------------------------------------------------------------------------------