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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CONTENT_BROWSER_BATTERY_STATUS_BATTERY_STATUS_PROVIDER_IMPL_H_ |
| 6 #define CONTENT_BROWSER_BATTERY_STATUS_BATTERY_STATUS_PROVIDER_IMPL_H_ |
| 7 |
| 8 #include "base/memory/singleton.h" |
| 9 #include "base/observer_list.h" |
| 10 #include "content/public/browser/battery_status_provider.h" |
| 11 |
| 12 namespace content { |
| 13 |
| 14 class BatteryStatusProviderImpl : public BatteryStatusProvider { |
| 15 public: |
| 16 class Observer { |
| 17 public: |
| 18 virtual void PowerChanged(const PowerSupplyStatus& power_status) = 0; |
| 19 }; |
| 20 |
| 21 static BatteryStatusProviderImpl* GetInstance(); |
| 22 |
| 23 void AddObserver(Observer* observer); |
| 24 void RemoveObserver(Observer* observer); |
| 25 |
| 26 // Overridden from BatteryStatusProvider. |
| 27 virtual void SendUpdate(const PowerSupplyStatus& power_status) OVERRIDE; |
| 28 |
| 29 private: |
| 30 friend struct DefaultSingletonTraits<BatteryStatusProviderImpl>; |
| 31 |
| 32 BatteryStatusProviderImpl(); |
| 33 virtual ~BatteryStatusProviderImpl(); |
| 34 |
| 35 ObserverList<Observer> observers_; |
| 36 |
| 37 DISALLOW_COPY_AND_ASSIGN(BatteryStatusProviderImpl); |
| 38 }; |
| 39 |
| 40 } // namespace content |
| 41 |
| 42 #endif // CONTENT_BROWSER_BATTERY_STATUS_BATTERY_STATUS_PROVIDER_IMPL_H_ |
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