Move onc and proxy pref names to components.

components/proxy_config/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 "components/proxy_config/pref_proxy_config_tracker_impl.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 200 matching lines @@
                                    default_settings);
 }
 
 // static
 void PrefProxyConfigTrackerImpl::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* pref_service) {
   base::DictionaryValue* default_settings =
       ProxyConfigDictionary::CreateSystem();
   pref_service->RegisterDictionaryPref(proxy_config::prefs::kProxy,
                                        default_settings);
+  pref_service->RegisterBooleanPref(proxy_config::prefs::kUseSharedProxies,
+                                    false);
 }
 
 // static
 ProxyPrefs::ConfigState PrefProxyConfigTrackerImpl::ReadPrefConfig(
     const PrefService* pref_service,
     net::ProxyConfig* config) {
   // Clear the configuration and source.
   *config = net::ProxyConfig();
   ProxyPrefs::ConfigState config_state = ProxyPrefs::CONFIG_UNSET;
 
@@ skipping 116 matching lines @@
       (config_state_ != ProxyPrefs::CONFIG_UNSET &&
        !pref_config_.Equals(new_config))) {
     config_state_ = config_state;
     if (config_state_ != ProxyPrefs::CONFIG_UNSET)
       pref_config_ = new_config;
     update_pending_ = true;
   }
   if (update_pending_)
     OnProxyConfigChanged(config_state, new_config);
 }