[WIP] Add Chromium-side support for the Screen Orientation API

content/renderer/screen_orientation_dispatcher.h

+// Copyright 2014 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_SCREEN_ORIENTATION_DISPATCHER_H_
+#define CONTENT_RENDERER_SCREEN_ORIENTATION_DISPATCHER_H_
+
+#include "base/macros.h"
+#include "content/public/renderer/render_view_observer.h"
+#include "third_party/WebKit/public/web/WebScreenOrientation.h"
+#include "third_party/WebKit/public/web/WebScreenOrientationClient.h"
+
+namespace blink { class WebScreenOrientationController; }
+
+namespace content {
+
+class RenderViewImpl;
+
+class ScreenOrientationDispatcher : public RenderViewObserver,
+                                    public blink::WebScreenOrientationClient {
+ public:
+  ScreenOrientationDispatcher(RenderViewImpl*);
+ private:
+  // RenderViewObserver
+  virtual void OrientationChangeEvent(int orientation) OVERRIDE;
+
+  // blink::WebScreenOrientationClient
+  virtual bool lockOrientation(blink::WebScreenOrientations) OVERRIDE;
+  virtual void unlockOrientation() OVERRIDE;
+  virtual void setController(blink::WebScreenOrientationController*) OVERRIDE;
+
+
+  blink::WebScreenOrientationController* controller_;
+};
+
+}  // namespace content
+
+#endif // CONTENT_RENDERER_SCREEN_ORIENTATION_DISPATCHER_H_