Start using <type_traits> and <utility> (C++11).

include/private/SkUtility.h

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkUtility_DEFINED
-#define SkUtility_DEFINED
-
-#include "SkTLogic.h"
-
-namespace skstd {
-
-template <typename T> inline remove_reference_t<T>&& move(T&& t) {
-  return static_cast<remove_reference_t<T>&&>(t);
-}
-
-template <typename T> inline T&& forward(remove_reference_t<T>& t) /*noexcept*/ {
-    return static_cast<T&&>(t);
-}
-template <typename T> inline T&& forward(remove_reference_t<T>&& t) /*noexcept*/ {
-    static_assert(!is_lvalue_reference<T>::value,
-                  "Forwarding an rvalue reference as an lvalue reference is not allowed.");
-    return static_cast<T&&>(t);
-}
-
-template <typename T> add_rvalue_reference_t<T> declval();
-
-}  // namespace skstd
-
-#endif