Replace WTF::forward with std::forward.

third_party/WebKit/Source/wtf/Utility.h

-// Copyright 2015 The Chromium 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 Utility_h
-#define Utility_h
-
-#include "wtf/TypeTraits.h"
-
-namespace WTF {
-
-// TODO(jbroman): When a C++11 standard library is available, replace this with
-// std::forward from <utility>.
-
-template <typename T>
-T&& forward(typename std::remove_reference<T>::type& t) { return static_cast<T&&>(t); }
-
-template <typename T>
-T&& forward(typename std::remove_reference<T>::type&& t) { return static_cast<T&&>(t); }
-
-} // namespace WTF
-
-#endif // Utility_h