Fix default initialization for DeviceMotionEvent.interval.

third_party/WebKit/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 97 matching lines @@
 
     bool m_canProvideAlpha;
     bool m_canProvideBeta;
     bool m_canProvideGamma;
   };
 
   static DeviceMotionData* create();
   static DeviceMotionData* create(Acceleration*,
                                   Acceleration* accelerationIncludingGravity,
                                   RotationRate*,
-                                  bool canProvideInterval,
                                   double interval);
   static DeviceMotionData* create(const DeviceMotionEventInit&);
   static DeviceMotionData* create(const WebDeviceMotionData&);
   DECLARE_TRACE();
 
   Acceleration* getAcceleration() const { return m_acceleration.get(); }
   Acceleration* getAccelerationIncludingGravity() const {
     return m_accelerationIncludingGravity.get();
   }
   RotationRate* getRotationRate() const { return m_rotationRate.get(); }
 
-  bool canProvideInterval() const { return m_canProvideInterval; }
   double interval() const { return m_interval; }
 
   bool canProvideEventData() const;
 
  private:
   DeviceMotionData();
   DeviceMotionData(Acceleration*,
                    Acceleration* accelerationIncludingGravity,
                    RotationRate*,
-                   bool canProvideInterval,
                    double interval);
 
   Member<Acceleration> m_acceleration;
   Member<Acceleration> m_accelerationIncludingGravity;
   Member<RotationRate> m_rotationRate;
-  bool m_canProvideInterval;
   double m_interval;
 };
 
 }  // namespace blink
 
 #endif  // DeviceMotionData_h