Roll Dart SDK from 2108000 to 8618891 (1 revision)

https://dart.googlesource.com/sdk.git/+log/210800069c36..8618891820cd

2022-05-20 dart-internal-sdk-dev-roller@dart-ci-internal.iam.gserviceaccount.com Version 2.18.0-137.0.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

@@ -45,7 +45,7 @@ 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': '210800069c3603d09d4b76b085f89a925bb66f8d',
+  'dart_revision': '8618891820cd70f0ad2fac6fbfafca99e2e89ec1',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -314,7 +314,7 @@ deps = {
    Var('dart_git') + '/test.git@d54846bc2b5cfa4e1445fda85c5e48a00940aa68',
 
   'src/third_party/dart/third_party/pkg/test_reflective_loader':
-   Var('dart_git') + '/test_reflective_loader.git@fcfce37666672edac849d2af6dffc0f8df236a94',
+   Var('dart_git') + '/test_reflective_loader.git@8d0de01bbe852fea1f8e33aba907abcba50a8a1e',
 
   'src/third_party/dart/third_party/pkg/typed_data':
    Var('dart_git') + '/typed_data.git@8b19e29bcf4077147de4d67adeabeb48270c65eb',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 942010ce7a505b3466b718fe4d1b4e40
+Signature: f158ca710f244c8bd454c8a951ce7a88
 
 UNUSED LICENSES: