Search state transitions not working

chrome/browser/ui/search/search_model.h

 // Copyright (c) 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_SEARCH_SEARCH_MODEL_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_H_
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
 #include "chrome/browser/ui/search/search_types.h"
@@ skipping 18 matching lines @@
   explicit SearchModel(TabContents* contents);
   ~SearchModel();
 
   // Change the mode.  Change notifications are sent to observers.  An animated
   // transition may be requested.
   void SetMode(const Mode& mode);
 
   // Get the active mode.
   const Mode& mode() const { return mode_; }
 
-  // Change the mode to |to_mode| only if |from_mode| is the active mode.
-  void MaybeChangeMode(Mode::Type from_mode, Mode::Type to_mode);
-
   // Add and remove observers.
   void AddObserver(SearchModelObserver* observer);
   void RemoveObserver(SearchModelObserver* observer);
 
   // This can be NULL if this is the browser model and it's accessed during
   // startup or shutdown.
   const TabContents* tab_contents() const {
     return contents_;
   }
 
@@ skipping 11 matching lines @@
   // Observers.
   ObserverList<SearchModelObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchModel);
 };
 
 }  // namespace search
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_H_