Move microtask queueing logic from JavaScript to C++

src/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_H_
 #define V8_RUNTIME_H_
 
 #include "allocation.h"
 #include "zone.h"
 
@@ skipping 226 matching lines @@
   F(GetArrayKeys, 2, 1) \
   F(MoveArrayContents, 2, 1) \
   F(EstimateNumberOfElements, 1, 1) \
   \
   /* Getters and Setters */ \
   F(LookupAccessor, 3, 1) \
   \
   /* ES5 */ \
   F(ObjectFreeze, 1, 1) \
   \
-  /* Harmony microtasks */ \
-  F(GetMicrotaskState, 0, 1) \
-  \
   /* Harmony modules */ \
   F(IsJSModule, 1, 1) \
   \
   /* Harmony symbols */ \
   F(CreateSymbol, 1, 1) \
   F(CreatePrivateSymbol, 1, 1) \
   F(CreateGlobalPrivateSymbol, 1, 1) \
   F(NewSymbolWrapper, 1, 1) \
   F(SymbolDescription, 1, 1) \
   F(SymbolRegistry, 0, 1) \
@@ skipping 35 matching lines @@
   F(MapIteratorClose, 1, 1) \
   \
   /* Harmony weak maps and sets */ \
   F(WeakCollectionInitialize, 1, 1) \
   F(WeakCollectionGet, 2, 1) \
   F(WeakCollectionHas, 2, 1) \
   F(WeakCollectionDelete, 2, 1) \
   F(WeakCollectionSet, 3, 1) \
   \
   /* Harmony events */ \
-  F(SetMicrotaskPending, 1, 1) \
+  F(EnqueueMicrotask, 1, 1) \
   F(RunMicrotasks, 0, 1) \
   \
   /* Harmony observe */ \
   F(IsObserved, 1, 1) \
   F(SetIsObserved, 1, 1) \
   F(GetObservationState, 0, 1) \
   F(ObservationWeakMapCreate, 0, 1) \
   F(ObserverObjectAndRecordHaveSameOrigin, 3, 1) \
   F(ObjectWasCreatedInCurrentOrigin, 1, 1) \
   F(ObjectObserveInObjectContext, 3, 1) \
@@ skipping 579 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_