Introduce incognito preference settings.

chrome/browser/policy/configuration_policy_pref_store.cc

Index: chrome/browser/policy/configuration_policy_pref_store.cc
diff --git a/chrome/browser/policy/configuration_policy_pref_store.cc b/chrome/browser/policy/configuration_policy_pref_store.cc
index c777e35c701e0c93c9514f79d2ecff12add852a6..9a17b625d2a748881fba82af62e213212ea14619 100644
--- a/chrome/browser/policy/configuration_policy_pref_store.cc
+++ b/chrome/browser/policy/configuration_policy_pref_store.cc
@@ -377,14 +377,14 @@ void ConfigurationPolicyPrefStore::Apply(ConfigurationPolicyType policy,
 }
 
 // static
-ConfigurationPolicyPrefStore*
+scoped_refptr<ConfigurationPolicyPrefStore>
 ConfigurationPolicyPrefStore::CreateManagedPlatformPolicyPrefStore() {
   return new ConfigurationPolicyPrefStore(
       g_configuration_policy_provider_keeper.Get().managed_platform_provider());
 }
 
 // static
-ConfigurationPolicyPrefStore*
+scoped_refptr<ConfigurationPolicyPrefStore>
 ConfigurationPolicyPrefStore::CreateDeviceManagementPolicyPrefStore(
     Profile* profile) {
   ConfigurationPolicyProviderKeeper* keeper =
@@ -398,7 +398,7 @@ ConfigurationPolicyPrefStore::CreateDeviceManagementPolicyPrefStore(
 }
 
 // static
-ConfigurationPolicyPrefStore*
+scoped_refptr<ConfigurationPolicyPrefStore>
 ConfigurationPolicyPrefStore::CreateRecommendedPolicyPrefStore() {
   return new ConfigurationPolicyPrefStore(
       g_configuration_policy_provider_keeper.Get().recommended_provider());