Implement the Blink part of the Device Motion API.

Source/modules/device_orientation/DeviceMotionData.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DeviceMotionData_h
 #define DeviceMotionData_h
 
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 #include <wtf/RefPtr.h>
 
+namespace WebKit {
+class WebDeviceMotionData;
+}
+
 namespace WebCore {
 
 class DeviceMotionData : public RefCounted<DeviceMotionData> {
 public:
     class Acceleration : public RefCounted<DeviceMotionData::Acceleration> {
     public:
         static PassRefPtr<Acceleration> create(bool canProvideX, double x, bool canProvideY, double y, bool canProvideZ, double z);
 
         bool canProvideX() const { return m_canProvideX; }
         bool canProvideY() const { return m_canProvideY; }
@@ skipping 35 matching lines @@
         double m_gamma;
 
         bool m_canProvideAlpha;
         bool m_canProvideBeta;
         bool m_canProvideGamma;
     };
 
     static PassRefPtr<DeviceMotionData> create();
     static PassRefPtr<DeviceMotionData> create(PassRefPtr<Acceleration> acceleration, PassRefPtr<Acceleration> accelerationIncludingGravity,
                                                PassRefPtr<RotationRate> rotationRate, bool canProvideInterval, double interval);
+    static PassRefPtr<DeviceMotionData> create(const WebKit::WebDeviceMotionData&);
 
     PassRefPtr<Acceleration> acceleration() const { return m_acceleration; }
     PassRefPtr<Acceleration> accelerationIncludingGravity() const { return m_accelerationIncludingGravity; }
     PassRefPtr<RotationRate> rotationRate() const { return m_rotationRate; }
 
     bool canProvideInterval() const { return m_canProvideInterval; }
     double interval() const { return m_interval; }
 
 private:
     DeviceMotionData();
     DeviceMotionData(PassRefPtr<Acceleration> acceleration, PassRefPtr<Acceleration> accelerationIncludingGravity,
                      PassRefPtr<RotationRate> rotationRate, bool canProvideInterval, double interval);
 
     RefPtr<Acceleration> m_acceleration;
     RefPtr<Acceleration> m_accelerationIncludingGravity;
     RefPtr<RotationRate> m_rotationRate;
     bool m_canProvideInterval;
     double m_interval;
 };
 
 } // namespace WebCore
 
 #endif // DeviceMotionData_h