Implement the Blink part of the Device Motion API.

Source/Platform/chromium/public/WebDeviceMotionListener.h

Index: Source/Platform/chromium/public/WebDeviceMotionListener.h
diff --git a/Source/WebKit/chromium/public/WebMediaSource.h b/Source/Platform/chromium/public/WebDeviceMotionListener.h
similarity index 83%
copy from Source/WebKit/chromium/public/WebMediaSource.h
copy to Source/Platform/chromium/public/WebDeviceMotionListener.h
index ae7864b3090d45d155dce3a55872d6f6a27830c4..b8da1500d6afa8f7c97bb38454effb119de1a4a2 100644
--- a/Source/WebKit/chromium/public/WebMediaSource.h
+++ b/Source/Platform/chromium/public/WebDeviceMotionListener.h
@@ -28,22 +28,19 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebMediaSource_h
-#define WebMediaSource_h
-
-#include "../../../Platform/chromium/public/WebURL.h"
-#include "WebTimeRange.h"
+#ifndef WebDeviceMotionListener_h
+#define WebDeviceMotionListener_h
 
 namespace WebKit {
 
-class WebMediaSourceClient;
+class WebDeviceMotionData;
 
-class WebMediaSource {
+class WebDeviceMotionListener {
 public:
-    virtual ~WebMediaSource() { };
-    virtual void open(WebMediaSourceClient*) = 0;
+    // This method is called every time new device motion data is available.
+    virtual void didChangeDeviceMotion(const WebDeviceMotionData&) = 0;
 };
 
 } // namespace WebKit
 
-#endif
+#endif // WebDeviceMotionListener_h