WebKit & WebCore part of the device motion implementation using the platform layer.

Source/Platform/chromium/public/Platform.h

Index: Source/Platform/chromium/public/Platform.h
diff --git a/Source/Platform/chromium/public/Platform.h b/Source/Platform/chromium/public/Platform.h
index 2ca26a3d567270b1d7124c4b48b269a9fcd31827..13a283d075ec59005269f603330da4fcd7044804 100644
--- a/Source/Platform/chromium/public/Platform.h
+++ b/Source/Platform/chromium/public/Platform.h
@@ -54,6 +54,7 @@ class WebBlobRegistry;
 class WebClipboard;
 class WebCompositorSupport;
 class WebCookieJar;
+class WebDeviceMotionReader;
 class WebDiscardableMemory;
 class WebFileSystem;
 class WebFileUtilities;
@@ -511,6 +512,8 @@ public:
     virtual void didStartWorkerRunLoop(const WebWorkerRunLoop&) { }
     virtual void didStopWorkerRunLoop(const WebWorkerRunLoop&) { }
 

[Peter Beverloo, 2013/04/09 17:29:53]

Please add a separate section for Device Orientation and Motion. This would also
benefit from some documentation.

[timvolodine, 2013/04/10 19:06:12]

Done.

+    virtual WebDeviceMotionReader* deviceMotionReader() { return 0; }
+
 protected:
     virtual ~Platform() { }
 };