Implement the Blink part of the Device Motion API.

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 566305709c633907bf65e267ca185e78e0b2df96..d5d14d070c5fdbe7b1b1017b661c34910f23d50b 100644
--- a/Source/Platform/chromium/public/Platform.h
+++ b/Source/Platform/chromium/public/Platform.h
@@ -54,6 +54,8 @@ class WebBlobRegistry;
 class WebClipboard;
 class WebCompositorSupport;
 class WebCookieJar;
+class WebDeviceMotionListener;
+class WebDeviceMotionProvider;

[darin (slow to review), 2013/05/17 14:13:09]

nit: no need for the provider forward declare here

[timvolodine, 2013/05/17 14:35:40]

Done.

 class WebDiscardableMemory;
 class WebFallbackThemeEngine;
 class WebFileSystem;
@@ -510,6 +512,12 @@ public:
     virtual void didStartWorkerRunLoop(const WebWorkerRunLoop&) { }
     virtual void didStopWorkerRunLoop(const WebWorkerRunLoop&) { }
 
+    // Device Motion / Orientation ----------------------------------------
+
+    // Sets a Listener to listen for device motion data updates.
+    // If null, the platform stops providing device motion data to the current listener.
+    virtual void setDeviceMotionListener(WebKit::WebDeviceMotionListener*) { }
+
 protected:
     virtual ~Platform() { }
 };