Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/net/pref_proxy_config_tracker_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/net/pref_proxy_config_tracker_impl.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/pref_registry_simple.h"
+#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/proxy_config_dictionary.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 
 using content::BrowserThread;
 
@@ skipping 176 matching lines @@
 }
 
 // static
 void PrefProxyConfigTrackerImpl::RegisterPrefs(PrefRegistrySimple* registry) {
   DictionaryValue* default_settings = ProxyConfigDictionary::CreateSystem();
   registry->RegisterDictionaryPref(prefs::kProxy, default_settings);
 }
 
 // static
 void PrefProxyConfigTrackerImpl::RegisterUserPrefs(
-    PrefServiceSyncable* pref_service) {
+    PrefRegistrySyncable* pref_service) {
   DictionaryValue* default_settings = ProxyConfigDictionary::CreateSystem();
   pref_service->RegisterDictionaryPref(prefs::kProxy,
                                        default_settings,
-                                       PrefServiceSyncable::UNSYNCABLE_PREF);
+                                       PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 ProxyPrefs::ConfigState PrefProxyConfigTrackerImpl::GetProxyConfig(
     net::ProxyConfig* config) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (config_state_ != ProxyPrefs::CONFIG_UNSET)
     *config = pref_config_;
   return config_state_;
 }
 
@@ skipping 115 matching lines @@
         config_state = ProxyPrefs::CONFIG_EXTENSION;
       else
         config_state = ProxyPrefs::CONFIG_OTHER_PRECEDE;
     } else  {
       config_state = ProxyPrefs::CONFIG_FALLBACK;
     }
   }
 
   return config_state;
 }