ES6: Add support for Map/Set forEach

src/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 279 matching lines @@
   F(GetHandler, 1, 1) \
   F(GetCallTrap, 1, 1) \
   F(GetConstructTrap, 1, 1) \
   F(Fix, 1, 1) \
   \
   /* Harmony sets */ \
   F(SetInitialize, 1, 1) \
   F(SetAdd, 2, 1) \
   F(SetHas, 2, 1) \
   F(SetDelete, 2, 1) \
+  F(SetClear, 1, 1) \
   F(SetGetSize, 1, 1) \
+  F(SetCreateIterator, 2, 1) \
+  \
+  F(SetIteratorNext, 1, 1) \
+  F(SetIteratorClose, 1, 1) \
   \
   /* Harmony maps */ \
   F(MapInitialize, 1, 1) \
   F(MapGet, 2, 1) \
   F(MapHas, 2, 1) \
   F(MapDelete, 2, 1) \
+  F(MapClear, 1, 1) \
   F(MapSet, 3, 1) \
   F(MapGetSize, 1, 1) \
+  F(MapCreateIterator, 2, 1) \
+  \
+  F(MapIteratorNext, 1, 1) \
+  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) \
@@ skipping 589 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_