Revert of Replace Chrome IPC with Mojo IPC for querying BatteryStatus service

device/battery/battery_status_service.cc

Index: device/battery/battery_status_service.cc
diff --git a/device/battery/battery_status_service.cc b/device/battery/battery_status_service.cc
deleted file mode 100644
index ae8336803f508b0afc897477472edbef8d98bb0c..0000000000000000000000000000000000000000
--- a/device/battery/battery_status_service.cc
+++ /dev/null
@@ -1,106 +0,0 @@
-// 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.
-
-#include "device/battery/battery_status_service.h"
-
-#include "base/bind.h"
-#include "base/message_loop/message_loop.h"
-#include "base/single_thread_task_runner.h"
-#include "device/battery/battery_monitor_impl.h"
-#include "device/battery/battery_status_manager.h"
-
-namespace device {
-
-BatteryStatusService::BatteryStatusService()
-    : main_thread_task_runner_(base::MessageLoop::current()->task_runner()),
-      update_callback_(base::Bind(&BatteryStatusService::NotifyConsumers,
-                                  base::Unretained(this))),
-      status_updated_(false),
-      is_shutdown_(false) {
-  callback_list_.set_removal_callback(
-      base::Bind(&BatteryStatusService::ConsumersChanged,
-                 base::Unretained(this)));
-}
-
-BatteryStatusService::~BatteryStatusService() {
-}
-
-BatteryStatusService* BatteryStatusService::GetInstance() {
-  return Singleton<BatteryStatusService,
-                   LeakySingletonTraits<BatteryStatusService> >::get();
-}
-
-scoped_ptr<BatteryStatusService::BatteryUpdateSubscription>
-BatteryStatusService::AddCallback(const BatteryUpdateCallback& callback) {
-  DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
-  DCHECK(!is_shutdown_);
-
-  if (!battery_fetcher_)
-    battery_fetcher_ = BatteryStatusManager::Create(update_callback_);
-
-  if (callback_list_.empty()) {
-    bool success = battery_fetcher_->StartListeningBatteryChange();
-    // On failure pass the default values back.
-    if (!success)
-      callback.Run(BatteryStatus());
-  }
-
-  if (status_updated_) {
-    // Send recent status to the new callback if already available.
-    callback.Run(status_);
-  }
-
-  return callback_list_.Add(callback);
-}
-
-void BatteryStatusService::ConsumersChanged() {
-  if (is_shutdown_)
-    return;
-
-  if (callback_list_.empty()) {
-    battery_fetcher_->StopListeningBatteryChange();
-    status_updated_ = false;
-  }
-}
-
-void BatteryStatusService::NotifyConsumers(const BatteryStatus& status) {
-  DCHECK(!is_shutdown_);
-
-  main_thread_task_runner_->PostTask(FROM_HERE, base::Bind(
-      &BatteryStatusService::NotifyConsumersOnMainThread,
-      base::Unretained(this),
-      status));
-}
-
-void BatteryStatusService::NotifyConsumersOnMainThread(
-    const BatteryStatus& status) {
-  DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
-  if (callback_list_.empty())
-    return;
-
-  status_ = status;
-  status_updated_ = true;
-  callback_list_.Notify(status_);
-}
-
-void BatteryStatusService::Shutdown() {
-  if (!callback_list_.empty())
-    battery_fetcher_->StopListeningBatteryChange();
-  battery_fetcher_.reset();
-  is_shutdown_ = true;
-}
-
-const BatteryStatusService::BatteryUpdateCallback&
-BatteryStatusService::GetUpdateCallbackForTesting() const {
-  return update_callback_;
-}
-
-void BatteryStatusService::SetBatteryManagerForTesting(
-    scoped_ptr<BatteryStatusManager> test_battery_manager) {
-  battery_fetcher_ = test_battery_manager.Pass();
-  status_ = BatteryStatus();
-  status_updated_ = false;
-}
-
-}  // namespace device