Implement the Blink part of the Device Motion API.

Source/core/platform/chromium/support/WebDeviceMotionData.cpp

Index: Source/core/platform/chromium/support/WebDeviceMotionData.cpp
diff --git a/Source/core/loader/UniqueIdentifier.h b/Source/core/platform/chromium/support/WebDeviceMotionData.cpp
similarity index 89%
copy from Source/core/loader/UniqueIdentifier.h
copy to Source/core/platform/chromium/support/WebDeviceMotionData.cpp
index c1dc5a2b000338f48b787c9292d80ef1671f5600..17e149e81758c823c230b334e9575df9781b2d28 100644
--- a/Source/core/loader/UniqueIdentifier.h
+++ b/Source/core/platform/chromium/support/WebDeviceMotionData.cpp
@@ -28,14 +28,14 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef UniqueIdentifier_h
-#define UniqueIdentifier_h
+#include "config.h"
+#include <public/WebDeviceMotionData.h>
 
-namespace WebCore {
-
-unsigned long createUniqueIdentifier();
+namespace WebKit {
 
+WebDeviceMotionData::WebDeviceMotionData()
+{
+    memset(this, 0, sizeof(*this));
 }
 
-#endif // UniqueIdentifier_h
-
+} // namespace WebKit