Compact Navigation prototype

chrome/browser/tabs/tab_strip_model_delegate.h

 // 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_TABS_TAB_STRIP_MODEL_DELEGATE_H_
 #define CHROME_BROWSER_TABS_TAB_STRIP_MODEL_DELEGATE_H_
 #pragma once
 
 #include "content/common/page_transition_types.h"
 
@@ skipping 100 matching lines @@
 
   // Returns true if any of the tabs can be closed.
   virtual bool CanCloseTab() const = 0;
 
   // Returns true if the vertical tabstrip presentation should be used.
   virtual bool UseVerticalTabs() const = 0;
 
   // Toggles the use of the vertical tabstrip.
   virtual void ToggleUseVerticalTabs() = 0;
 
+  // Returns true if the compact navigation bar should be used.
+  virtual bool UseCompactNavigationBar() const = 0;
+
+  // Toggles the use of the compact navigation bar.
+  virtual void ToggleUseCompactNavigationBar() = 0;
+
   // Returns true if the tab strip can use large icons.
   virtual bool LargeIconsPermitted() const = 0;
 
  protected:
   virtual ~TabStripModelDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_TABS_TAB_STRIP_MODEL_DELEGATE_H_