Roll Dart SDK from dc389e4a01f3 to 9470ea6b00a5 (1 revision)

https://dart.googlesource.com/sdk.git/+log/dc389e4a01f3..9470ea6b00a5

2024-01-22 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.4.0-56.0.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 dart-vm-team@google.com,jonahwilliams@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

Author: skia-flutter-autoroll

DEPS

@@ -65,7 +65,7 @@ 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': 'dc389e4a01f3487163267b0f46c1b150e579b955',
+  'dart_revision': '9470ea6b00a588cbd19713919979954403f1465a',
 
   # 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: daead36ced55089addbba48079b45282
+Signature: b94327adc1096bd6bc6080a3345c0946
 
 ====================================================================================================
 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/+/7a91ef52d2002ef7a0e30f95fa6a398a31c2fbcd
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/9470ea6b00a588cbd19713919979954403f1465a
 /third_party/fallback_root_certificates/
 
 ====================================================================================================

sky/packages/sky_engine/LICENSE

@@ -31236,7 +31236,7 @@ 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/+/dc389e4a01f3487163267b0f46c1b150e579b955
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/9470ea6b00a588cbd19713919979954403f1465a
 /third_party/fallback_root_certificates/
 
 --------------------------------------------------------------------------------