mac: Fix bug where exiting tab fullscreen would cause Chrome menubar to disappear.

chrome/browser/ui/browser_window.h

 // Copyright 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 CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 #define CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 
 #include "base/callback_forward.h"
 #include "chrome/browser/lifetime/browser_close_manager.h"
 #include "chrome/browser/signin/signin_header_helper.h"
@@ skipping 295 matching lines @@
   // if the renderer did not process it.
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) = 0;
 
   // Clipboard commands applied to the whole browser window.
   virtual void Cut() = 0;
   virtual void Copy() = 0;
   virtual void Paste() = 0;
 
 #if defined(OS_MACOSX)
-  // Enters Mac specific fullscreen mode with chrome displayed (e.g. omnibox)
-  // on OSX 10.7+, a.k.a. Lion Fullscreen mode.
-  // Invalid to call on OSX earlier than 10.7.
-  // Enters either from non fullscreen, or from fullscreen without chrome.
-  // Exit to normal fullscreen with EnterFullscreen().
+  // The following two methods cause the browser window to enter AppKit
+  // Fullscreen. The methods are idempotent. The methods are invalid to call on
+  // OSX 10.6. One method displays chrome (e.g. omnibox, tabstrip), whereas the
+  // other method hides it.
   virtual void EnterFullscreenWithChrome() = 0;
+  virtual void EnterFullscreenWithoutChrome() = 0;
+
   virtual bool IsFullscreenWithChrome() = 0;
   virtual bool IsFullscreenWithoutChrome() = 0;
 #endif
 
   // Return the correct disposition for a popup window based on |bounds|.
   virtual WindowOpenDisposition GetDispositionForPopupBounds(
       const gfx::Rect& bounds) = 0;
 
   // Construct a FindBar implementation for the |browser|.
   virtual FindBar* CreateFindBar() = 0;
@@ skipping 57 matching lines @@
   virtual void ExecuteExtensionCommand(const extensions::Extension* extension,
                                        const extensions::Command& command) = 0;
 
  protected:
   friend class BrowserCloseManager;
   friend class BrowserView;
   virtual void DestroyBrowser() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_WINDOW_H_