Roll Dart SDK from 6c85a403add7 to fb78ccd8c565 (1 revision) (#55303)

https://dart.googlesource.com/sdk.git/+log/6c85a403add7..fb78ccd8c565

2024-09-19 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.6.0-267.0.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 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 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

@@ -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': '6c85a403add746ec6ac9e92e4a13d55daf0148ff',
+  'dart_revision': 'fb78ccd8c56579e4395f5e795c0ba6a823edbedc',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

sky/packages/sky_engine/LICENSE

@@ -32054,7 +32054,7 @@ 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/+/6c85a403add746ec6ac9e92e4a13d55daf0148ff
+You may obtain a copy of this library's Source Code Form from: https://dart.googlesource.com/sdk/+/fb78ccd8c56579e4395f5e795c0ba6a823edbedc
 /third_party/fallback_root_certificates/
 
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