extensions: Relocate pref name constants.

chrome/browser/extensions/install_tracker.cc

 // Copyright 2013 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/extensions/install_tracker.h"
 
 #include "base/bind.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/notification_service.h"
+#include "extensions/browser/pref_names.h"
 
 namespace extensions {
 
 InstallTracker::InstallTracker(Profile* profile,
                                extensions::ExtensionPrefs* prefs) {
   AppSorting* sorting = prefs->app_sorting();
 
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_INSTALLED,
       content::Source<Profile>(profile));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
       content::Source<Profile>(profile));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
       content::Source<Profile>(profile));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
       content::Source<Profile>(profile));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LAUNCHER_REORDERED,
       content::Source<AppSorting>(sorting));
   registrar_.Add(this, chrome::NOTIFICATION_APP_INSTALLED_TO_APPLIST,
       content::Source<Profile>(profile));
 
   pref_change_registrar_.Init(prefs->pref_service());
-  pref_change_registrar_.Add(prefs::kExtensionsPref,
+  pref_change_registrar_.Add(pref_names::kExtensions,
                              base::Bind(&InstallTracker::OnAppsReordered,
                                         base::Unretained(this)));
 }
 
 InstallTracker::~InstallTracker() {
 }
 
 void InstallTracker::AddObserver(InstallObserver* observer) {
   observers_.AddObserver(observer);
 }
@@ skipping 73 matching lines @@
     default:
       NOTREACHED();
   }
 }
 
 void InstallTracker::OnAppsReordered() {
   FOR_EACH_OBSERVER(InstallObserver, observers_, OnAppsReordered());
 }
 
 }  // namespace extensions