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

chrome/browser/profiles/profile_impl.cc

 // 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.
 
 #include "chrome/browser/profiles/profile_impl.h"
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 295 matching lines @@
 #if !defined(OS_CHROMEOS)
   // Listen for bookmark model load, to bootstrap the sync service.
   // On CrOS sync service will be initialized after sign in.
   registrar_.Add(this, NotificationType::BOOKMARK_MODEL_LOADED,
                  Source<Profile>(this));
 #endif
 
   ssl_config_service_manager_.reset(
       SSLConfigServiceManager::CreateDefaultManager(this));
 
-#if defined(OS_CHROMEOS)
-  chromeos_preferences_.reset(new chromeos::Preferences());
-  chromeos_preferences_->Init(prefs);
-#endif
-
   pinned_tab_service_.reset(new PinnedTabService(this));
 
   // Initialize the BackgroundModeManager - this has to be done here before
   // InitExtensions() is called because it relies on receiving notifications
   // when extensions are loaded. BackgroundModeManager is not needed under
   // ChromeOS because Chrome is always running (no need for special keep-alive
   // or launch-on-startup support).
 #if !defined(OS_CHROMEOS)
   background_mode_manager_.reset(new BackgroundModeManager(this,
       CommandLine::ForCurrentProcess()));
@@ skipping 1152 matching lines @@
         new chromeos::ProxyConfigServiceImpl();
   }
   return chromeos_proxy_config_service_impl_;
 }
 
 void ProfileImpl::SetupChromeOSEnterpriseExtensionObserver() {
   DCHECK(!chromeos_enterprise_extension_observer_.get());
   chromeos_enterprise_extension_observer_.reset(
       new chromeos::EnterpriseExtensionObserver(this));
 }
+
+void ProfileImpl::InitChromeOSPreferences() {
+  chromeos_preferences_.reset(new chromeos::Preferences());
+  chromeos_preferences_->Init(GetPrefs());
+}
 #endif  // defined(OS_CHROMEOS)
 
 PrefProxyConfigTracker* ProfileImpl::GetProxyConfigTracker() {
   if (!pref_proxy_config_tracker_)
     pref_proxy_config_tracker_ = new PrefProxyConfigTracker(GetPrefs());
 
   return pref_proxy_config_tracker_;
 }
 
 PrerenderManager* ProfileImpl::GetPrerenderManager() {
   if (!PrerenderManager::IsPrerenderingEnabled())
     return NULL;
   if (!prerender_manager_)
     prerender_manager_ = new PrerenderManager(this);
   return prerender_manager_;
 }