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

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 0fde233bb4f650cf68b64be3afbf3661e5a2ed06..459c1de2fcaab38303f8c793a65f31f6a44dc0b8 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -313,11 +313,6 @@ ProfileImpl::ProfileImpl(const FilePath& path)
   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
@@ -1490,6 +1485,11 @@ void ProfileImpl::SetupChromeOSEnterpriseExtensionObserver() {
   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() {