Improve parsing of async and generator methods.

tests/co19/co19-runtime.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 [ $runtime == vm ]
 # These tests are timing dependent and should be non-flaky once the fix for
 # https://github.com/dart-lang/co19/issues/86 is merged into master.
 # (They are skipped on $runtime == pre_compiled below.)
 LibTest/isolate/Isolate/spawnUri_A01_t06: Pass, Fail # Issue 28269
 LibTest/isolate/Isolate/spawnUri_A01_t07: Pass, Fail  # Issue 28269
@@ skipping 69 matching lines @@
 
 [ $system == windows ]
 LibTest/collection/ListMixin/ListMixin_class_A01_t02: Pass, Slow
 LibTest/collection/ListBase/ListBase_class_A01_t02: Pass, Slow
 
 [ $runtime == vm || $runtime == dart_precompiled ]
 LibTest/isolate/Isolate/spawn_A02_t01: Skip # co19 issue 667
 LibTest/html/*: SkipByDesign # dart:html not supported on VM.
 LayoutTests/fast/*: SkipByDesign # DOM not supported on VM.
 WebPlatformTest/*: SkipByDesign # dart:html not supported on VM.
+Language/Expressions/Function_Invocation/async_generator_invokation_t08: Fail # Issue 25967
+Language/Expressions/Function_Invocation/async_generator_invokation_t10: Fail # Issue 25967
+Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_async_t08: RuntimeError # Issue 25748
+Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_async_t09: RuntimeError # Issue 25748
+Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_async_t10: RuntimeError # Issue 25748
+Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_sync_t05: RuntimeError # Issue 25662,25634
+Language/Classes/Getters/type_object_t01: RuntimeError # Issue 23721
+Language/Classes/Getters/type_object_t02: RuntimeError # Issue 23721
+Language/Classes/Setters/type_object_t01: RuntimeError # Issue 23721
+Language/Classes/Setters/type_object_t02: RuntimeError # Issue 23721
+Language/Classes/Static_Methods/type_object_t01: RuntimeError # Issue 23721
+Language/Classes/Static_Methods/type_object_t02: RuntimeError # Issue 23721
+Language/Expressions/Assignment/super_assignment_failed_t05: RuntimeError # Issue 25671
 
 [ ($runtime == vm || $runtime == dart_precompiled) && $mode == debug && $builder_tag == asan ]
 Language/Types/Interface_Types/subtype_t27: Skip  # Issue 21174.
 
 [ ($runtime == vm || $runtime == dart_precompiled) && $compiler != dartk && $compiler != dartkp ]
 # co19 update Sep 29, 2015 (3ed795ea02e022ef19c77cf1b6095b7c8f5584d0)
-Language/Classes/Getters/type_object_t01: RuntimeError # Issue 23721
-Language/Classes/Getters/type_object_t02: RuntimeError # Issue 23721
-Language/Classes/Setters/type_object_t01: RuntimeError # Issue 23721
-Language/Classes/Setters/type_object_t02: RuntimeError # Issue 23721
-Language/Classes/Static_Methods/type_object_t01: RuntimeError # Issue 23721
-Language/Classes/Static_Methods/type_object_t02: RuntimeError # Issue 23721
 Language/Expressions/Identifier_Reference/built_in_identifier_t35: MissingCompileTimeError # Issue 25732
 Language/Expressions/Identifier_Reference/built_in_identifier_t36: MissingCompileTimeError # Issue 25732
 Language/Expressions/Identifier_Reference/built_in_identifier_t37: MissingCompileTimeError # Issue 25732
 Language/Expressions/Identifier_Reference/built_in_identifier_t53: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t54: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t55: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t56: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t57: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t58: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t59: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t60: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t61: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t62: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t63: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t64: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t65: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t66: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t67: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_identifier_t68: MissingCompileTimeError # Issue 25733
 Language/Expressions/Identifier_Reference/built_in_not_dynamic_t14: MissingCompileTimeError # Issue 25732
 Language/Expressions/Identifier_Reference/built_in_not_dynamic_t19: MissingCompileTimeError # Issue 25772
 Language/Expressions/Method_Invocation/Ordinary_Invocation/object_method_invocation_t01: MissingCompileTimeError # Issue 25496
 Language/Expressions/Method_Invocation/Ordinary_Invocation/object_method_invocation_t02: MissingCompileTimeError # Issue 25496
-Language/Expressions/Assignment/super_assignment_failed_t05: RuntimeError # Issue 25671
-Language/Expressions/Function_Invocation/async_generator_invokation_t08: Fail # Issue 25967
-Language/Expressions/Function_Invocation/async_generator_invokation_t10: Fail # Issue 25967
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t01: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t02: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t03: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t04: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t05: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t06: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t07: MissingCompileTimeError # Issue 24332
 Language/Expressions/Property_Extraction/Getter_Access_and_Method_Extraction/class_object_member_t08: MissingCompileTimeError # Issue 24332
 Language/Mixins/Mixin_Application/syntax_t16: CompileTimeError # Issue 25765
 Language/Mixins/declaring_constructor_t05: MissingCompileTimeError # Issue 24767
 Language/Mixins/declaring_constructor_t06: MissingCompileTimeError # Issue 24767
-Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_async_t08: RuntimeError # Issue 25748
-Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_async_t09: RuntimeError # Issue 25748
-Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_async_t10: RuntimeError # Issue 25748
-Language/Statements/Yield_and_Yield_Each/Yield_Each/execution_sync_t05: RuntimeError # Issue 25662,25634
 Language/Statements/Yield_and_Yield_Each/Yield_Each/location_t01: MissingCompileTimeError # Issue 25495
 Language/Statements/Yield_and_Yield_Each/Yield_Each/location_t03: MissingCompileTimeError # Issue 25495
 Language/Statements/Yield_and_Yield_Each/Yield_Each/location_t05: MissingCompileTimeError # Issue 25495
 
 [ $runtime == dart_precompiled || $mode == product ]
 Language/Metadata/*: SkipByDesign # Uses dart:mirrors
 Language/Expressions/Null/instance_of_class_null_t01: Skip # Uses dart:mirrors
 
 [ $compiler == precompiler || $compiler == app_jit || $mode == product ]
 Language/Libraries_and_Scripts/Imports/deferred_import_t01: Skip # Eager loading
@@ skipping 66 matching lines @@
 LibTest/core/Uri/Uri_A06_t03: Pass, Timeout
 LibTest/core/Uri/encodeQueryComponent_A01_t02: Pass, Timeout
 LibTest/isolate/Isolate/spawn_A01_t04: Pass, Timeout
 LibTest/isolate/ReceivePort/take_A01_t02: Skip # Issue 27773
 
 [ $runtime == vm && $mode == release && $system == linux && ($arch == x64 || $arch == ia32)]
 LibTest/isolate/Isolate/spawn_A04_t05: Pass, Slow
 
 [ $runtime == vm && $mode == release && $system == linux && $arch == ia32]
 service/dev_fs_spawn_test: Pass, Fail # Issue 28411