Search state transitions not working

chrome/browser/ui/search/search_model.cc

 // 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.
 
 #include "chrome/browser/ui/search/search_model.h"
 
 #include "chrome/browser/ui/search/search.h"
 #include "chrome/browser/ui/search/search_model_observer.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 
@@ skipping 21 matching lines @@
   const Mode old_mode = mode_;
   mode_ = new_mode;
 
   FOR_EACH_OBSERVER(SearchModelObserver, observers_,
                     ModeChanged(old_mode, mode_));
 
   // Animation is transient, it is cleared after observers are notified.
   mode_.animate = false;
 }
 
-void SearchModel::MaybeChangeMode(Mode::Type from_mode, Mode::Type to_mode) {
-  if (mode_.mode == from_mode) {
-    Mode mode(to_mode, true);
-    SetMode(mode);
-  }
-}
-
 void SearchModel::AddObserver(SearchModelObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void SearchModel::RemoveObserver(SearchModelObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 } //  namespace search
 } //  namespace chrome