Reland "Replace Chrome IPC with Mojo IPC for querying BatteryStatus service"

device/battery/battery_status_manager.h

 // 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.
 
-#ifndef CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_
-#define CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_
+#ifndef DEVICE_BATTERY_BATTERY_STATUS_MANAGER_H_
+#define DEVICE_BATTERY_BATTERY_STATUS_MANAGER_H_
 
 #include "base/memory/scoped_ptr.h"
-#include "build/build_config.h"
-#include "content/browser/battery_status/battery_status_service.h"
+#include "device/battery/battery_status_service.h"
 
-namespace content {
+namespace device {
 
 // Platform specific manager class for fetching battery status data.
-class CONTENT_EXPORT BatteryStatusManager {
+class BatteryStatusManager {
  public:
   // Creates a BatteryStatusManager object. |callback| should be called when the
   // battery status changes.
   static scoped_ptr<BatteryStatusManager> Create(
       const BatteryStatusService::BatteryUpdateCallback& callback);
 
   virtual ~BatteryStatusManager() {}
 
   // Start listening for battery status changes. New updates are signalled
   // by invoking the callback provided at construction time.
   // Note that this is called in the IO thread.
   virtual bool StartListeningBatteryChange() = 0;
 
   // Stop listening for battery status changes.
   // Note that this is called in the IO thread.
   virtual void StopListeningBatteryChange() = 0;
 };
 
-}  // namespace content
+}  // namespace device
 
-#endif  // CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_
+#endif  // DEVICE_BATTERY_BATTERY_STATUS_MANAGER_H_