Implements part of Device Motion in the Renderer

content/renderer/device_motion_dispatcher.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_DEVICE_MOTION_DISPATCHER_H_
+#define CONTENT_RENDERER_DEVICE_MOTION_DISPATCHER_H_
+
+#include "third_party/WebKit/Source/Platform/chromium/public/WebDeviceMotionDetector.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebDeviceMotionData.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "content/public/renderer/render_view_observer.h"
+
+class RenderViewImpl;
+
+namespace WebKit {
+class WebDeviceMotionDetectorClient;
+}
+
+struct DeviceMotionMsg_Updated_Params;
+
+class DeviceMotionDispatcher : public content::RenderViewObserver,
+                               public WebKit::WebDeviceMotionDetector {
+ public:
+  explicit DeviceMotionDispatcher(RenderViewImpl* render_view);
+  virtual ~DeviceMotionDispatcher();
+
+ private:
+  // RenderView::Observer implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // WebKit::WebDeviceMotionDetector implementation.
+  virtual void startUpdating(WebKit::WebDeviceMotionDetectorClient* client)
+      OVERRIDE;
+  virtual void stopUpdating() OVERRIDE;
+  virtual WebKit::WebDeviceMotionData lastMotion() const OVERRIDE;
+
+  void OnDeviceMotionUpdated(
+      const DeviceMotionMsg_Updated_Params& p);
+
+  scoped_ptr<WebKit::WebDeviceMotionDetectorClient> client_;
+  WebKit::WebDeviceMotionData last_motion_;
+  bool started_;
+};
+
+#endif  // CONTENT_RENDERER_DEVICE_MOTION_DISPATCHER_H_