Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/wtf/Forward.h

 /*
  *  Copyright (C) 2006, 2009, 2011 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library 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,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef WTF_Forward_h
 #define WTF_Forward_h
 
 #include "wtf/Compiler.h"
 #include <stddef.h>
 
 namespace WTF {
 
+template <typename T> class OwnPtr;
+#if COMPILER(MSVC)
+#ifndef PassOwnPtr
+#define PassOwnPtr OwnPtr
+#endif
+#else
+template <typename T>
+using PassOwnPtr = OwnPtr<T>;
+#endif
 template <typename T> class PassRefPtr;
 template <typename T> class RefPtr;
 template <size_t size> class SizeSpecificPartitionAllocator;
 template <typename T> class StringBuffer;
 template <typename T, size_t inlineCapacity, typename Allocator> class Vector;
 template <typename T> class WeakPtr;
 
 class ArrayBuffer;
 class ArrayBufferView;
 class ArrayPiece;
 class AtomicString;
 class CString;
 class Float32Array;
 class Float64Array;
 class Int8Array;
 class Int16Array;
 class Int32Array;
 class String;
 class StringBuilder;
 class StringImpl;
 class StringView;
 class Uint8Array;
 class Uint8ClampedArray;
 class Uint16Array;
 class Uint32Array;
 
 } // namespace WTF
 
+using WTF::OwnPtr;
+using WTF::PassOwnPtr;
 using WTF::PassRefPtr;
 using WTF::RefPtr;
 using WTF::Vector;
 using WTF::WeakPtr;
 
 using WTF::ArrayBuffer;
 using WTF::ArrayBufferView;
 using WTF::ArrayPiece;
 using WTF::AtomicString;
 using WTF::CString;
 using WTF::Float32Array;
 using WTF::Float64Array;
 using WTF::Int8Array;
 using WTF::Int16Array;
 using WTF::Int32Array;
 using WTF::String;
 using WTF::StringBuffer;
 using WTF::StringBuilder;
 using WTF::StringImpl;
 using WTF::StringView;
 using WTF::Uint8Array;
 using WTF::Uint8ClampedArray;
 using WTF::Uint16Array;
 using WTF::Uint32Array;
 
 #endif // WTF_Forward_h