Revert of Migrates battery_status from content/renderer/ to WebKit/platform/

third_party/WebKit/Source/platform/battery/battery_dispatcher_proxy.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 "platform/battery/battery_dispatcher_proxy.h"
-
-#include "platform/battery/battery_status.h"
-#include "platform/threading/BindForMojo.h"
-#include "public/platform/Platform.h"
-#include "wtf/Assertions.h"
-
-namespace blink {
-
-BatteryDispatcherProxy::BatteryDispatcherProxy(Listener* listener)
-    : listener_(listener) {
-  ASSERT(listener_);
-}
-
-BatteryDispatcherProxy::~BatteryDispatcherProxy() {}
-
-void BatteryDispatcherProxy::StartListening() {
-  ASSERT(!monitor_.is_bound());
-  Platform::current()->connectToRemoteService(mojo::GetProxy(&monitor_));
-  // monitor_ can be null during testing.
-  if (monitor_)
-    QueryNextStatus();
-}
-
-void BatteryDispatcherProxy::StopListening() {
-  // monitor_ can be null during testing.
-  if (monitor_)
-    monitor_.reset();
-}
-
-void BatteryDispatcherProxy::QueryNextStatus() {
-  monitor_->QueryNextStatus(
-      sameThreadBindForMojo(&BatteryDispatcherProxy::OnDidChange, this));
-}
-
-void BatteryDispatcherProxy::OnDidChange(
-    device::BatteryStatusPtr battery_status) {
-  // monitor_ can be null during testing.
-  if (monitor_)
-    QueryNextStatus();
-
-  DCHECK(battery_status);
-
-  BatteryStatus status(battery_status->charging,
-                       battery_status->charging_time,
-                       battery_status->discharging_time,
-                       battery_status->level);
-  listener_->OnUpdateBatteryStatus(status);
-}
-
-} // namespace blink