Replace template_util.h stuff with C++11 <type_traits>

base/callback_internal.h

 // Copyright (c) 2012 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.
 
 // This file contains utility functions and classes that help the
 // implementation, and management of the Callback objects.
 
 #ifndef BASE_CALLBACK_INTERNAL_H_
 #define BASE_CALLBACK_INTERNAL_H_
 
@@ skipping 93 matching lines @@
 // std::unique_ptr.
 // TODO(dcheng): Revisit this when Windows switches to VS2015 by default.
 template <typename T> struct IsMoveOnlyType {
   template <typename U>
   static YesType Test(const typename U::MoveOnlyTypeForCPP03*);
 
   template <typename U>
   static NoType Test(...);
 
   static const bool value = sizeof((Test<T>(0))) == sizeof(YesType) &&
-                            !is_const<T>::value;
+                            !std::is_const<T>::value;
 };
 
 // Specialization of IsMoveOnlyType so that std::unique_ptr is still considered
 // move-only, even without the sentinel member.
 template <typename T, typename D>
 struct IsMoveOnlyType<std::unique_ptr<T, D>> : std::true_type {};
 
 // Specialization of std::vector, so that it's considered move-only if the
 // element type is move-only. Allocator is explicitly ignored when determining
 // move-only status of the std::vector.
@@ skipping 83 matching lines @@
 template <typename T>
 typename std::enable_if<IsMoveOnlyType<T>::value, T>::type CallbackForward(
     T& t) {
   return std::move(t);
 }
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_CALLBACK_INTERNAL_H_