Convert PowerSaveBlockResourceThrottle to be client of WakeLock mojo service.

content/browser/loader/power_save_block_resource_throttle.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/loader/power_save_block_resource_throttle.h"
-
-#include "device/power_save_blocker/power_save_blocker.h"
-
-namespace content {
-
-namespace {
-
-const int kPowerSaveBlockDelaySeconds = 30;
-
-}  // namespace
-
-PowerSaveBlockResourceThrottle::PowerSaveBlockResourceThrottle(
-    const std::string& host,
-    scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> blocking_task_runner)
-    : host_(host),
-      ui_task_runner_(ui_task_runner),
-      blocking_task_runner_(blocking_task_runner) {}
-
-PowerSaveBlockResourceThrottle::~PowerSaveBlockResourceThrottle() {
-}
-
-void PowerSaveBlockResourceThrottle::WillStartRequest(bool* defer) {
-  // Delay PowerSaveBlocker activation to dismiss small requests.
-  timer_.Start(FROM_HERE,
-               base::TimeDelta::FromSeconds(kPowerSaveBlockDelaySeconds),
-               this,
-               &PowerSaveBlockResourceThrottle::ActivatePowerSaveBlocker);
-}
-
-void PowerSaveBlockResourceThrottle::WillProcessResponse(bool* defer) {
-  // Stop blocking power save after request finishes.
-  power_save_blocker_.reset();
-  timer_.Stop();
-}
-
-const char* PowerSaveBlockResourceThrottle::GetNameForLogging() const {
-  return "PowerSaveBlockResourceThrottle";
-}
-
-void PowerSaveBlockResourceThrottle::ActivatePowerSaveBlocker() {
-  power_save_blocker_.reset(new device::PowerSaveBlocker(
-      device::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
-      device::PowerSaveBlocker::kReasonOther, "Uploading data to " + host_,
-      ui_task_runner_, blocking_task_runner_));
-}
-
-}  // namespace content