Roll Dart SDK from 4a4f34a to 72aa281 (9 revisions)

https://dart.googlesource.com/sdk.git/+log/4a4f34a69fc1..72aa28127bbf

2022-01-18 [email protected] Version 2.17.0-27.0.dev
2022-01-18 [email protected] Version 2.17.0-26.0.dev
2022-01-17 [email protected] Version 2.17.0-25.0.dev
2022-01-17 [email protected] Version 2.17.0-24.0.dev
2022-01-17 [email protected] Version 2.17.0-23.0.dev
2022-01-17 [email protected] Version 2.17.0-22.0.dev
2022-01-15 [email protected] Version 2.17.0-21.0.dev
2022-01-15 [email protected] Version 2.17.0-20.0.dev
2022-01-15 [email protected] Version 2.17.0-19.0.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] 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

@@ -39,7 +39,7 @@ 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': '4a4f34a69fc1324d9ff75483a7d1a94e18815ed7',
+  'dart_revision': '72aa28127bbf1c2f5eca6f1132abde15d5a366bc',
 
   # 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: 8c6c5a148afa09a4b250b0b1c1634622
+Signature: f651dff37e63f8affc1c1981a8032b95
 
 UNUSED LICENSES: