Remove base::enable_if

chrome/browser/sync_file_system/drive_backend/callback_helper.h

 // Copyright 2014 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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_HELPER_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_HELPER_H_
 
+#include <type_traits>
+
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 
 // TODO(tzik): Merge this file to media/base/bind_to_current_loop.h.
 
 namespace sync_file_system {
 namespace drive_backend {
 
 namespace internal {
 
 template <typename T>
-typename base::enable_if<
-    base::internal::IsMoveOnlyType<T>::value,
-    base::internal::PassedWrapper<T> >::type
+typename std::enable_if<base::internal::IsMoveOnlyType<T>::value,
+                        base::internal::PassedWrapper<T>>::type
 RebindForward(T& t) {
   return base::Passed(&t);
 }
 
 template <typename T>
-typename base::enable_if<
-    !base::internal::IsMoveOnlyType<T>::value,
-    T&>::type
+typename std::enable_if<!base::internal::IsMoveOnlyType<T>::value, T&>::type
 RebindForward(T& t) {
   return t;
 }
 
 template <typename T>
 class CallbackHolder {
  public:
   CallbackHolder(const scoped_refptr<base::SequencedTaskRunner>& task_runner,
                  const tracked_objects::Location& from_here,
                  const base::Callback<T>& callback)
@@ skipping 57 matching lines @@
     const base::Callback<T>& callback) {
   return RelayCallbackToTaskRunner(
       base::ThreadTaskRunnerHandle::Get(),
       from_here, callback);
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_HELPER_H_