Get rid of trivial IncognitoUserPrefStore and PerTabUserPrefStore.

chrome/browser/ui/prefs/prefs_tab_helper.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_UI_PREFS_PREFS_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_PREFS_PREFS_TAB_HELPER_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 
+class OverlayUserPrefStore;
 class PrefService;
 class Profile;
 struct WebPreferences;
 
 // Per-tab class to handle user preferences.
 class PrefsTabHelper : public content::WebContentsObserver,
                        public content::NotificationObserver {
  public:
   explicit PrefsTabHelper(content::WebContents* contents);
   virtual ~PrefsTabHelper();
 
+  static void InitIncognitoUserPrefStore(OverlayUserPrefStore* pref_store);
+  static void InitPerTabUserPrefStore(OverlayUserPrefStore* pref_store);
   static void RegisterUserPrefs(PrefService* prefs);
 
   PrefService* per_tab_prefs() { return per_tab_prefs_.get(); }
 
  protected:
   // Update the RenderView's WebPreferences. Exposed as protected for testing.
   virtual void UpdateWebPreferences();
 
   // content::WebContentsObserver overrides, exposed as protected for testing.
   virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
@@ skipping 15 matching lines @@
   content::NotificationRegistrar registrar_;
 
   scoped_ptr<PrefService> per_tab_prefs_;
   PrefChangeRegistrar pref_change_registrar_;
   PrefChangeRegistrar per_tab_pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefsTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_PREFS_PREFS_TAB_HELPER_H_