Roll Dart SDK from 160774c04493 to 5a8b34f040f5 (1 revision) (#39160)

https://dart.googlesource.com/sdk.git/+log/160774c04493..5a8b34f040f5

2023-01-26 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.0.0-169.0.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,zra@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://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': '160774c04493a9d564a029d8722ccd545a4424c0',
+  'dart_revision': '5a8b34f040f51c3c8e9ef5b31d1372ad92b642dd',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -466,7 +466,7 @@ deps = {
    Var('dart_git') + '/yaml_edit.git' + '@' + Var('dart_yaml_edit_rev'),
 
   'src/third_party/dart/tools/sdks':
-   {'packages': [{'version': 'version:2.19.0-374.0.dev', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
+   {'packages': [{'version': 'version:2.19.0', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.