WIP: Pref service: use the incognito support from Chrome

chrome/browser/prefs/pref_service_syncable_util.cc

 // Copyright 2015 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/prefs/pref_service_syncable_util.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/sync_preferences/pref_service_syncable.h"
 
 #if defined(OS_ANDROID)
 #include "components/proxy_config/proxy_config_pref_names.h"
 #endif
 
 sync_preferences::PrefServiceSyncable* PrefServiceSyncableFromProfile(
     Profile* profile) {
   return static_cast<sync_preferences::PrefServiceSyncable*>(
       profile->GetPrefs());
 }
-
-sync_preferences::PrefServiceSyncable* PrefServiceSyncableIncognitoFromProfile(
-    Profile* profile) {
-  return static_cast<sync_preferences::PrefServiceSyncable*>(
-      profile->GetOffTheRecordPrefs());
-}
-
-sync_preferences::PrefServiceSyncable* CreateIncognitoPrefServiceSyncable(
-    sync_preferences::PrefServiceSyncable* pref_service,
-    PrefStore* incognito_extension_pref_store) {
-  // List of keys that cannot be changed in the user prefs file by the incognito
-  // profile.  All preferences that store information about the browsing history
-  // or behavior of the user should have this property.
-  std::vector<const char*> overlay_pref_names;
-  overlay_pref_names.push_back(prefs::kBrowserWindowPlacement);
-  overlay_pref_names.push_back(prefs::kMediaRouterTabMirroringSources);
-  overlay_pref_names.push_back(prefs::kSaveFileDefaultDirectory);
-#if defined(OS_ANDROID)
-  overlay_pref_names.push_back(proxy_config::prefs::kProxy);
-#endif
-  return pref_service->CreateIncognitoPrefService(
-      incognito_extension_pref_store, overlay_pref_names);
-}