Remove PrefObserver usage, batch 9.

chrome/browser/ui/app_list/apps_model_builder.cc

 // Copyright (c) 2012 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/ui/app_list/apps_model_builder.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 39 matching lines @@
   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_LAUNCHER_REORDERED,
       content::Source<ExtensionSorting>(extension_prefs->extension_sorting()));
   registrar_.Add(this, chrome::NOTIFICATION_APP_INSTALLED_TO_APPLIST,
       content::Source<Profile>(profile_));
 
   pref_change_registrar_.Init(extension_prefs->pref_service());
-  pref_change_registrar_.Add(extensions::ExtensionPrefs::kExtensionsPref, this);
+  pref_change_registrar_.Add(extensions::ExtensionPrefs::kExtensionsPref,
+                             base::Bind(&AppsModelBuilder::ResortApps,
+                                        base::Unretained(this)));
 
   model_->AddObserver(this);
 }
 
 AppsModelBuilder::~AppsModelBuilder() {
   model_->RemoveObserver(this);
 }
 
 void AppsModelBuilder::Build() {
   DCHECK(model_ && model_->item_count() == 0);
@@ skipping 135 matching lines @@
     case chrome::NOTIFICATION_APP_INSTALLED_TO_APPLIST: {
       highlight_app_id_ = *content::Details<const std::string>(details).ptr();
       HighlightApp();
       break;
     }
     default:
       NOTREACHED();
   }
 }
 
-void AppsModelBuilder::OnPreferenceChanged(PrefServiceBase* service,
-                                           const std::string& pref_name) {
-  ResortApps();
-}
-
 void AppsModelBuilder::ListItemsAdded(size_t start, size_t count) {
 }
 
 void AppsModelBuilder::ListItemsRemoved(size_t start, size_t count) {
 }
 
 void AppsModelBuilder::ListItemMoved(size_t index, size_t target_index) {
   if (ignore_changes_)
     return;
 
   ExtensionAppItem* prev = target_index > 0 ? GetAppAt(target_index - 1) : NULL;
   ExtensionAppItem* next = target_index + 1 < model_->item_count() ?
       GetAppAt(target_index + 1) : NULL;
   GetAppAt(target_index)->Move(prev, next);
 }
 
 void AppsModelBuilder::ListItemsChanged(size_t start, size_t count) {
   NOTREACHED();
 }