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diff --git a/chrome/browser/ui/fullscreen_controller.h b/chrome/browser/ui/fullscreen_controller.h
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+// Copyright (c) 2011 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 CHROME_BROWSER_UI_FULLSCREEN_CONTROLLER_H_
+#define CHROME_BROWSER_UI_FULLSCREEN_CONTROLLER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/task.h"
+#include "chrome/browser/ui/fullscreen_exit_bubble_type.h"
+#include "chrome/common/content_settings.h"
+
+class Browser;
+class BrowserWindow;
+class GURL;
+class Profile;
+class TabContents;
+class TabContentsWrapper;
+
+// There are two different kinds of fullscreen mode - "tab fullscreen" and
+// "browser fullscreen". "Tab fullscreen" refers to when a tab enters
+// fullscreen mode via the JS fullscreen API, and "browser fullscreen" refers
+// to the user putting the browser itself into fullscreen mode from the UI. The
+// difference is that tab fullscreen has implications for how the contents of
+// the tab render (eg: a video element may grow to consume the whole tab),
+// whereas browser fullscreen mode doesn't. Therefore if a user forces an exit
+// from tab fullscreen, we need to notify the tab so it can stop rendering in
+// its fullscreen mode.
+
+// This class implements fullscreen and mouselock behaviour.
+class FullscreenController : public base::RefCounted<FullscreenController> {
+ public:
+  FullscreenController(BrowserWindow* window,
+                       Profile* profile,
+                       Browser* browser);
+  virtual ~FullscreenController();
+
+  // Querying.
+  bool IsFullscreenForTab() const;
+  bool IsFullscreenForTab(const TabContents* tab) const;
+
+  // Requests.
+  void RequestToLockMouse(TabContents* tab);
+  void ToggleFullscreenModeForTab(TabContents* tab, bool enter_fullscreen);
+#if defined(OS_MACOSX)
+  void TogglePresentationMode(bool for_tab);
+#endif
+  // TODO(koz): Change |for_tab| to an enum.
+  void ToggleFullscreenMode(bool for_tab);
+
+  // Notifications.
+  void LostMouseLock();
+  void OnTabClosing(TabContents* tab_contents);
+  void OnTabDeactivated(TabContentsWrapper* contents);
+  void OnAcceptFullscreenPermission(const GURL& url,
+                                    FullscreenExitBubbleType bubble_type);
+  void OnDenyFullscreenPermission(FullscreenExitBubbleType bubble_type);
+  void WindowFullscreenStateChanged();
+  bool HandleUserPressedEscape();
+
+  FullscreenExitBubbleType GetFullscreenExitBubbleType() const;
+
+ private:
+  enum MouseLockState {
+    MOUSELOCK_NOT_REQUESTED,
+    // The page requests to lock the mouse and the user hasn't responded to the
+    // request.
+    MOUSELOCK_REQUESTED,
+    // Mouse lock has been allowed by the user.
+    MOUSELOCK_ACCEPTED
+  };
+
+  // Notifies the tab that it has been forced out of fullscreen mode if
+  // necessary.
+  void NotifyTabOfFullscreenExitIfNecessary();
+  // Make the current tab exit fullscreen mode if it is in it.
+  void ExitTabbedFullscreenModeIfNecessary();
+  void UpdateFullscreenExitBubbleContent();
+  void NotifyFullscreenChange();
+  ContentSetting GetFullscreenSetting(const GURL& url) const;
+  ContentSetting GetMouseLockSetting(const GURL& url) const;
+
+  BrowserWindow* window_;
+  Profile* profile_;
+  Browser* browser_;
+
+  // If there is currently a tab in fullscreen mode (entered via
+  // webkitRequestFullScreen), this is its wrapper.
+  TabContentsWrapper* fullscreened_tab_;
+
+  // True if the current tab entered fullscreen mode via webkitRequestFullScreen
+  bool tab_caused_fullscreen_;
+  // True if tab fullscreen has been allowed, either by settings or by user
+  // clicking the allow button on the fullscreen infobar.
+  bool tab_fullscreen_accepted_;
+
+  MouseLockState mouse_lock_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(FullscreenController);
+};
+
+#endif  // CHROME_BROWSER_UI_FULLSCREEN_CONTROLLER_H_