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

device/battery/battery_monitor_impl.cc

-// 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_monitor_impl.h"
-
-#include "base/bind.h"
-
-namespace device {
-
-// static
-void BatteryMonitorImpl::Create(
-    mojo::InterfaceRequest<BatteryMonitor> request) {
-  BindToRequest(new BatteryMonitorImpl(), &request);
-}
-
-BatteryMonitorImpl::BatteryMonitorImpl() {
-}
-
-BatteryMonitorImpl::~BatteryMonitorImpl() {
-}
-
-void BatteryMonitorImpl::OnConnectionEstablished() {
-  subscription_ = BatteryStatusService::GetInstance()->AddCallback(
-        base::Bind(&BatteryMonitorImpl::DidChange, base::Unretained(this)));
-}
-
-void BatteryMonitorImpl::DidChange(const BatteryStatus& battery_status) {
-  BatteryStatusPtr status(BatteryStatus::New());
-  *status = battery_status;
-  client()->DidChange(status.Pass());
-}
-
-}  // namespace device