Implement Android shared memory data fetcher for Device Motion.

content/browser/device_orientation/data_fetcher_impl_win.h

 // Copyright (c) 2013 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 CONTENT_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_WIN_H_
 #define CONTENT_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_WIN_H_
 
 #include <SensorsApi.h>
 
 #include "base/compiler_specific.h"
@@ skipping 18 matching lines @@
  public:
   virtual ~DataFetcherImplWin();
 
   // Factory function. It returns NULL on error.
   // The created object listens for events for the whole lifetime.
   static DataFetcher* Create();
 
   // Implement DataFetcher.
   virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE;
 
+  void Stop();
+
  private:
   class SensorEventSink;
   friend SensorEventSink;
 
+  static DataFetcherImplWin* instance();
+
   DataFetcherImplWin();
   bool Initialize();
   void OnOrientationData(Orientation* orientation);
   const Orientation* GetOrientation();
 
   base::win::ScopedComPtr<ISensor> sensor_;
 
   // Value returned by GetDeviceData.
   scoped_refptr<Orientation> current_orientation_;
 
   // The 1-element buffer follows DataFetcherImplAndroid implementation.
   // It is written by OnOrientationData and read by GetDeviceData.
   base::Lock next_orientation_lock_;
   scoped_refptr<Orientation> next_orientation_;
 
   DISALLOW_COPY_AND_ASSIGN(DataFetcherImplWin);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_WIN_H_