Roll src/third_party/dart 2e8d912848..ccb6ba948b (30 commits)

dart-lang/sdk@ccb6ba948b [cfe] Gather constraints from both possibilities for FutureOr
dart-lang/sdk@f1f709ec11 Migration: add support for metadata on library/import/export/part/part-of directives.
dart-lang/sdk@1daf84f0dc [nnbd_migration] support spread elements
dart-lang/sdk@7413879026 [analyzer] Add getter isNullAware to SpreadElement
dart-lang/sdk@78bf8f08b9 Fix language_2/deferred_load_library_wrong_args_test.
dart-lang/sdk@9fccb5120b [vm/bytecode] Fix clobbering of exception handler types in bytecode reader.
dart-lang/sdk@b4724c1d78 Fix language_2/regress_23408_test.
dart-lang/sdk@424ef3646e [vm/fuzzer] Print steps to reproduce on divergence
dart-lang/sdk@76bc894576 [vm/bytecode] Generate explicit DebugCheck for assignment to static field
dart-lang/sdk@95db62d6a2 [vm/io] Return data right away if it's ready.
dart-lang/sdk@601d8934f4 Fix issue31596 tests
dart-lang/sdk@32848c3a25 Migration: Rework handling of assignments to FutureOr.
dart-lang/sdk@36648acfcc [nnbd_migration] Pass as casts to _handleAssignment
dart-lang/sdk@98837e6e43 [vm/bytecode] Workaround for incorrect type parameters in function types
dart-lang/sdk@4e7b77e428 Fix language_2/super_bound_closure_test
dart-lang/sdk@a2c8b69af0 Status file cleanup
dart-lang/sdk@879cdeffb3 update scanner test
dart-lang/sdk@909e2515af Fix regress_29025_test
dart-lang/sdk@ecb9a113d1 Fix language_2/regress_22976_test
dart-lang/sdk@ef2a21ffd9 [vm/bytecode] Use local variable information when compiling from bytecode
dart-lang/sdk@27f803db76 fix for convert_to_null_aware_operators
dart-lang/sdk@0851b9ae4c Consider both getter and setter when deciding whether an extension reference is ambiguous.
dart-lang/sdk@4310d157a1 Fix language_2/type_promotion_more_specific_test/04
dart-lang/sdk@438c595950 Fix language_2/regress_30339_test
dart-lang/sdk@9497b7b0a4 Delete language_2/regress_29405_test
dart-lang/sdk@6f38a73618 Remove most of the task model.
dart-lang/sdk@fbd21a0d1f Guard against null in exportedDeclarations.
dart-lang/sdk@b4614904de Migration: add support for indexing on a dynamic type.
dart-lang/sdk@9fd672b1b7 fix for prefer_expression_bodies
dart-lang/sdk@c2e55a26bc [vm/bytecode] Cleanup support for old bytecode format versions before v10

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': '2e8d9128486b57b437046045d898a7ff0e6f9289',
+  'dart_revision': 'ccb6ba948b447bbb4257d99d906818dd5b7461a5',
 
   # 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: 8430918929b4abe4fd737ce8b1e47b92
+Signature: be76fed3450519c6cca61b5a685a19a5
 
 UNUSED LICENSES: