Roll src/third_party/dart acac9ab11b..d53d355c6c (12 commits)

dart-lang/sdk@d53d355c6c Add subscript operator to extension method setter/getter tests.
dart-lang/sdk@d012dfc7a6 Removing 'webkit' prefix, as most modern web browsers will accept 'RTCPeerConnection'
dart-lang/sdk@3edcf8f959 [vm/bytecode] Split AST and bytecode platform dill files
dart-lang/sdk@dbe8f6a9df Revert "[build] Rely on default host os TARGET_OS unless cross-compiling."
dart-lang/sdk@4895185b1e Fix NPE when extension override is invoked without a call method (issue 38505)
dart-lang/sdk@381d808686 Add UNDEFINED_EXTENSION_OPERATOR.
dart-lang/sdk@863694b7eb bump to linter 0.1.98
dart-lang/sdk@bb879969dd Fix some dart sdk documentation issues
dart-lang/sdk@326c00c6d7 [vm/fuzzer] Reduce number of methods per class
dart-lang/sdk@a6cc7b94c7 Reland "[dartdevc] fix for const / overridden fields"
dart-lang/sdk@4167867bb2 [build] Rely on default host os TARGET_OS unless cross-compiling.
dart-lang/sdk@9cc7ec8916 [vm/aot] Do not devirtualize calls with mismatching number of type arguments

Author: bkonyi

DEPS

@@ -34,7 +34,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'acac9ab11b25abb490dfd0b632f570a01772df79',
+  'dart_revision': 'd53d355c6c14fc20c196d2f1af3a7dd1c93c5a89',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -62,7 +62,7 @@ vars = {
   'dart_http_throttle_tag': '1.0.2',
   'dart_intl_tag': '0.15.7',
   'dart_json_rpc_2_tag': '2.0.9',
-  'dart_linter_tag': '0.1.97+1',
+  'dart_linter_tag': '0.1.98',
   'dart_logging_tag': '0.11.3+2',
   'dart_markdown_tag': '2.0.3',
   'dart_matcher_tag': '0.12.3',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: f3f6e0be8e1385cf5f8dbc881b42f8b2
+Signature: 900a7e29c255768c01a0b4f13aabe70d
 
 UNUSED LICENSES: