Roll Dart SDK from d4e388e to 31ddf66 (1 revision)

https://dart.googlesource.com/sdk.git/+log/d4e388e04060..31ddf6605f14

2022-01-12 [email protected] Version 2.17.0-7.0.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': 'd4e388e04060d31639df83b27eb5201e608711ce',
+  'dart_revision': '31ddf6605f14fc6b7f08431bc52ca4f3f92f0496',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -55,7 +55,7 @@ vars = {
   'dart_root_certificates_rev': '692f6d6488af68e0121317a9c2c9eb393eb0ee50',
   'dart_shelf_proxy_tag': 'v1.0.0',
   'dart_shelf_static_rev': '202ec1a53c9a830c17cf3b718d089cf7eba568ad',
-  'dart_watcher_rev': '3924194385fb215cef483193ed2879a618a3d69c',
+  'dart_watcher_rev': 'f76997ab0c857dc5537ac0975a9ada92b54ef949',
   'dart_webdev_rev': '832b096c0c24798d3df46faa7b7661fe930573c2',
   'dart_webkit_inspection_protocol_rev': 'dd6fb5d8b536e19cedb384d0bbf1f5631923f1e8',
   'dart_yaml_edit_rev': 'df1452bfe1653286277a1a8f34dddf3e4fbedd9e',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 240d7f94bfd67b2799c5c872c34be2b3
+Signature: e65fbc728485c35958e5235588d8da54
 
 UNUSED LICENSES: