Fix a bug that caused Chrome OS system preferences not to work in the guest mode.

chrome/browser/profiles/profile.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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_H_
 #pragma once
 
@@ skipping 505 matching lines @@
   virtual void ChangeAppLocale(
       const std::string& locale, AppLocaleChangedVia via) = 0;
 
   // Returns ChromeOS's ProxyConfigServiceImpl, creating if not yet created.
   virtual chromeos::ProxyConfigServiceImpl*
       GetChromeOSProxyConfigServiceImpl() = 0;
 
   // Creates ChromeOS's EnterpriseExtensionListener.
   virtual void SetupChromeOSEnterpriseExtensionObserver() = 0;
 
+  // Initializes Chrome OS's preferences.
+  virtual void InitChromeOSPreferences() = 0;
+
 #endif  // defined(OS_CHROMEOS)
 
   // Returns the helper object that provides the proxy configuration service
   // access to the the proxy configuration possibly defined by preferences.
   virtual PrefProxyConfigTracker* GetProxyConfigTracker() = 0;
 
   // Returns the PrerenderManager used to prerender entire webpages for this
   // profile.
   virtual PrerenderManager* GetPrerenderManager() = 0;
 
@@ skipping 47 matching lines @@
   bool restored_last_session_;
 
   // Accessibility events will only be propagated when the pause
   // level is zero.  PauseAccessibilityEvents and ResumeAccessibilityEvents
   // increment and decrement the level, respectively, rather than set it to
   // true or false, so that calls can be nested.
   int accessibility_pause_level_;
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_H_