ES6: Add support for Map.prototype.forEach and Set.prototype.forEach

src/factory.h

 // Copyright 2014 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_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "isolate.h"
 
 namespace v8 {
@@ skipping 467 matching lines @@
   Handle<JSFunction> NewFunctionWithPrototype(Handle<String> name,
                                               InstanceType type,
                                               int instance_size,
                                               Handle<JSObject> prototype,
                                               Handle<Code> code,
                                               bool force_initial_map);
 
   Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
                                                  Handle<Code> code);
 
+  Handle<JSObject> NewIteratorResultObject(Handle<Object> value, bool done);
+
   Handle<String> NumberToString(Handle<Object> number);
   Handle<String> Uint32ToString(uint32_t value);
 
   enum ApiInstanceType {
     JavaScriptObject,
     InnerGlobalObject,
     OuterGlobalObject
   };
 
   Handle<JSFunction> CreateApiFunction(
@@ skipping 110 matching lines @@
 
   // Update the map cache in the native context with (keys, map)
   Handle<MapCache> AddToMapCache(Handle<Context> context,
                                  Handle<FixedArray> keys,
                                  Handle<Map> map);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_