Roll src/third_party/dart 43417df9c7..c91da3fa26 (12 commits)

dart-lang/sdk@c91da3fa26 [vm/fuzzer] renable stacktrace stress test on FFI
dart-lang/sdk@9a817c722b Add tests for extension method setter/getter basename shadowing.
dart-lang/sdk@4210112bfd [vm/debugger] Increase verbosity of --verbose-debug when setting breakpoints.
dart-lang/sdk@969c01f02c Remove unused methods from DeclarationResolver.
dart-lang/sdk@da66bf6f77 Issue 37951. Identify widgets in IfElement and ForElement.
dart-lang/sdk@2011b6fa6b Flow analysis: refactor and unit test switch statement logic.
dart-lang/sdk@e0c37247a2 Migration: integrate flow analysis of logical not expressions
dart-lang/sdk@48f8454960 [vm] Force raw variables created during scope building to be on the stack
dart-lang/sdk@103a43dd73 [cfe] Towards deprecating Builder.target
dart-lang/sdk@06150f4d2c Migration: fix some tests of assertion behavior.
dart-lang/sdk@9c761e1531 Migration: integrate flow analysis of if-null (`??`) expressions.
dart-lang/sdk@1f17242a4f [infra] Remove non-essential test expectations from dart2js status files

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': '43417df9c7573f0f8812a7902905adaf0569d3a0',
+  'dart_revision': 'c91da3fa26f201e26ee0e18f2460ad0ee3e0c9f5',
 
   # 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

-Signature: 6e656bdcf80af052469a843629e1583e
+Signature: b7e1c86662fc6c0f68f05345abc20fd5
 
 UNUSED LICENSES: