Implement the content/renderer and content/browser part of the Device Motion API.

content/renderer/renderer_webkitplatformsupport_impl.h

Index: content/renderer/renderer_webkitplatformsupport_impl.h
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.h b/content/renderer/renderer_webkitplatformsupport_impl.h
index de19386b53e1830b4fd3acc6fc5d21396a0fea27..4cbc4a8d10ef92c13b5dc01312bb6ad864f8a2c3 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.h
+++ b/content/renderer/renderer_webkitplatformsupport_impl.h
@@ -23,6 +23,7 @@ class WebClipboardImpl;
 }
 
 namespace content {
+class DeviceMotionEventPump;
 class GamepadSharedMemoryReader;
 class RendererClipboardClient;
 class ThreadSafeSender;
@@ -124,6 +125,8 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   // Set WebGamepads to return when sampleGamepads() is invoked.
   static void SetMockGamepadsForTesting(const WebKit::WebGamepads& pads);
 
+  virtual WebKit::WebDeviceMotionHandler* deviceMotionHandler() OVERRIDE;
+
  private:
   bool CheckPreparsedJsCachingEnabled() const;
 
@@ -163,6 +166,8 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
 
   scoped_ptr<GamepadSharedMemoryReader> gamepad_shared_memory_reader_;
 
+  scoped_ptr<DeviceMotionEventPump> device_motion_event_pump_;
+
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 
   scoped_refptr<cc::ContextProvider> shared_offscreen_context_;