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

content/renderer/battery_status/battery_status_dispatcher.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 "content/renderer/battery_status/battery_status_dispatcher.h"
+
+#include "content/public/common/service_registry.h"
+#include "content/public/renderer/render_thread.h"
+#include "third_party/WebKit/public/platform/WebBatteryStatusListener.h"
+
+namespace content {
+
+BatteryStatusDispatcher::BatteryStatusDispatcher(
+    blink::WebBatteryStatusListener* listener)
+    : listener_(listener) {
+  DCHECK(listener_);
+
+  if (ServiceRegistry* registry = RenderThread::Get()->GetServiceRegistry()) {
+    // registry can be null during testing.
+    registry->ConnectToRemoteService(mojo::GetProxy(&monitor_));
+    QueryNextStatus();
+  }
+}
+
+BatteryStatusDispatcher::~BatteryStatusDispatcher() {
+}
+
+void BatteryStatusDispatcher::QueryNextStatus() {
+  monitor_->QueryNextStatus(
+      base::Bind(&BatteryStatusDispatcher::DidChange, base::Unretained(this)));
+}
+
+void BatteryStatusDispatcher::DidChange(
+    device::BatteryStatusPtr battery_status) {
+  // monitor_ can be null during testing.
+  if (monitor_)
+    QueryNextStatus();
+
+  DCHECK(battery_status);
+
+  blink::WebBatteryStatus web_battery_status;
+  web_battery_status.charging = battery_status->charging;
+  web_battery_status.chargingTime = battery_status->charging_time;
+  web_battery_status.dischargingTime = battery_status->discharging_time;
+  web_battery_status.level = battery_status->level;
+  listener_->updateBatteryStatus(web_battery_status);
+}
+
+}  // namespace content