Roll Dart SDK from ef97fe2415fd to 8b962b2b9e72 (1 revision) (#48425)

https://dart.googlesource.com/sdk.git/+log/ef97fe2415fd..8b962b2b9e72

2023-11-27 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.3.0-169.0.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,jacksongardner@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

diff --git a/DEPS b/DEPS
index 018bfbe..7981023 100644
--- a/DEPS
+++ b/DEPS
@@ -59,7 +59,7 @@
   # 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': 'ef97fe2415fd6f05b6380c03969748956e3f76fa',
+  'dart_revision': '8b962b2b9e72cc5fa3f64185a4c3df92c165f772',
 
   # 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

diff --git a/ci/licenses_golden/licenses_dart b/ci/licenses_golden/licenses_dart
index a70c4ac..4f4f1d6 100644
--- a/ci/licenses_golden/licenses_dart
+++ b/ci/licenses_golden/licenses_dart
@@ -1,4 +1,4 @@
-Signature: 061d398ef256f498d94973efe470fe21
+Signature: da04620e75a8a0cbe131039309a6e875
 
 ====================================================================================================
 LIBRARY: dart