Roll Dart SDK from 1dc26efa3c4c to 0456c4011cb3 (1 revision) (#39644)

https://dart.googlesource.com/sdk.git/+log/1dc26efa3c4c..0456c4011cb3

2023-02-15 [email protected] Version 3.0.0-237.0.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 [email protected],[email protected],[email protected],[email protected] 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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: skia-flutter-autoroll

DEPS

@@ -48,7 +48,7 @@ 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': '1dc26efa3c4c05c4d3452e704979f6620064ea60',
+  'dart_revision': '0456c4011cb3c345406bc2497496c3a4261410a8',
 
   # 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_third_party

@@ -1,4 +1,4 @@
-Signature: 8b04a8caa5cf3d40252d0f1d7ac6c192
+Signature: 09e96630ee5216fbec648fc696e88629
 
 ====================================================================================================
 LIBRARY: angle