Reland of 'Move content/browser/power_save_blocker to //device/power_save_blocker'

content/browser/power_save_blocker_impl.cc

-// Copyright (c) 2013 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.
-
-#include "content/browser/power_save_blocker_impl.h"
-
-#include "build/build_config.h"
-
-namespace content {
-
-PowerSaveBlocker::~PowerSaveBlocker() {}
-
-// static
-std::unique_ptr<PowerSaveBlocker> PowerSaveBlocker::CreateWithTaskRunners(
-    PowerSaveBlocker::PowerSaveBlockerType type,
-    PowerSaveBlocker::Reason reason,
-    const std::string& description,
-    scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> blocking_task_runner) {
-  return std::unique_ptr<PowerSaveBlocker>(new PowerSaveBlockerImpl(
-      type, reason, description, ui_task_runner, blocking_task_runner));
-}
-
-}  // namespace content