WebKit side of merge from r41149 to r41181.

JavaScriptCore/runtime/JSArray.h

 /*
  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
  *  Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
@@ skipping 104 matching lines @@
     JSArray* constructEmptyArray(ExecState*, unsigned initialLength);
     JSArray* constructArray(ExecState*, JSValuePtr singleItemValue);
     JSArray* constructArray(ExecState*, const ArgList& values);
 
     inline JSArray* asArray(JSValuePtr value)
     {
         ASSERT(asObject(value)->inherits(&JSArray::info));
         return static_cast<JSArray*>(asObject(value));
     }
 
+    inline bool isJSArray(JSGlobalData* globalData, JSValuePtr v) { return v.isCell() && v.asCell()->vptr() == globalData->jsArrayVPtr; }
+
 } // namespace JSC
 
 #endif // JSArray_h