Delete unused prefs::kHomePageChanged.

chrome/browser/ui/browser.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_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 660 matching lines @@
 
   // Overridden from SearchModelObserver:
   virtual void ModelChanged(const SearchModel::State& old_state,
                             const SearchModel::State& new_state) OVERRIDE;
 
   // Command and state updating ///////////////////////////////////////////////
 
   // Handle changes to kDevTools preference.
   void OnDevToolsDisabledChanged();
 
-  // Set the preference that indicates that the home page has been changed.
-  void MarkHomePageAsChanged();
-
   // UI update coalescing and handling ////////////////////////////////////////
 
   // Asks the toolbar (and as such the location bar) to update its state to
   // reflect the current tab's current URL, security state, etc.
   // If |should_restore_state| is true, we're switching (back?) to this tab and
   // should restore any previous location bar state (such as user editing) as
   // well.
   void UpdateToolbar(bool should_restore_state);
 
   // Updates the browser's search model with the tab's search model.
@@ skipping 221 matching lines @@
   bool window_has_shown_;
 
   // Currently open color chooser. Non-NULL after OpenColorChooser is called and
   // before DidEndColorChooser is called.
   scoped_ptr<content::ColorChooser> color_chooser_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_