Implement a Menu Item to Hide the Toolbar in Fullscreen

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/chrome_signin_helper.h"
@@ skipping 137 matching lines @@
   virtual bool ShouldHideUIForFullscreen() const = 0;
 
   // Returns true if the fullscreen bubble is visible.
   virtual bool IsFullscreenBubbleVisible() const = 0;
 
   // Show or hide the tab strip, toolbar and bookmark bar when in browser
   // fullscreen.
   // Currently only supported on Mac.
   virtual bool SupportsFullscreenWithToolbar() const = 0;
   virtual void UpdateFullscreenWithToolbar(bool with_toolbar) = 0;
+  virtual void ToggleFullscreenToolbar() = 0;
   virtual bool IsFullscreenWithToolbar() const = 0;
+  virtual bool ShouldHideFullscreenToolbar() const = 0;
 
 #if defined(OS_WIN)
   // Sets state for entering or exiting Win8 Metro snap mode.
   virtual void SetMetroSnapMode(bool enable) = 0;
 
   // Returns whether the window is currently in Win8 Metro snap mode.
   virtual bool IsInMetroSnapMode() const = 0;
 #endif
 
   // Returns the location bar.
@@ skipping 233 matching lines @@
   // Returns object implementing ExclusiveAccessContext interface.
   virtual ExclusiveAccessContext* GetExclusiveAccessContext() = 0;
 
  protected:
   friend class BrowserCloseManager;
   friend class BrowserView;
   virtual void DestroyBrowser() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_WINDOW_H_