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diff --git a/chromium/content/browser/screen_orientation/screen_orientation_dispatcher_host.h b/chromium/content/browser/screen_orientation/screen_orientation_dispatcher_host.h
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+++ b/chromium/content/browser/screen_orientation/screen_orientation_dispatcher_host.h
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+// 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_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_HOST_H_
+#define CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_HOST_H_
+
+#include "content/public/browser/web_contents_observer.h"
+#include "third_party/WebKit/public/platform/WebScreenOrientationLockType.h"
+#include "third_party/WebKit/public/platform/WebScreenOrientationType.h"
+
+namespace content {
+
+class RenderFrameHost;
+class ScreenOrientationProvider;
+class WebContents;
+
+// ScreenOrientationDispatcherHost receives lock and unlock requests from the
+// RenderFrames and dispatch them to the ScreenOrientationProvider. It also
+// make sure that the right RenderFrame get replied for each lock request.
+class CONTENT_EXPORT ScreenOrientationDispatcherHost
+    : public WebContentsObserver {
+ public:
+  explicit ScreenOrientationDispatcherHost(WebContents* web_contents);
+  virtual ~ScreenOrientationDispatcherHost();
+
+  // WebContentsObserver
+  virtual bool OnMessageReceived(const IPC::Message&,
+                                 RenderFrameHost* render_frame_host) OVERRIDE;
+
+  void OnOrientationChange(blink::WebScreenOrientationType orientation);
+
+  void SetProviderForTests(ScreenOrientationProvider* provider);
+
+ private:
+  void OnLockRequest(RenderFrameHost* render_frame_host,
+                     blink::WebScreenOrientationLockType orientation,
+                     int request_id);
+  void OnUnlockRequest(RenderFrameHost* render_frame_host);
+
+  static ScreenOrientationProvider* CreateProvider();
+
+  scoped_ptr<ScreenOrientationProvider> provider_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenOrientationDispatcherHost);
+};
+
+}  // namespace content
+
+#endif // CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_HOST_H_