Remove the last usages of PrefObserver outside of Prefs.

chrome/browser/plugins/plugin_status_pref_setter.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/plugins/plugin_status_pref_setter.h"
 
 #include "base/bind.h"
 #include "chrome/browser/pepper_flash_settings_manager.h"
 #include "chrome/browser/plugins/plugin_data_remover_helper.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.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_source.h"
 #include "content/public/browser/plugin_service.h"
 #include "webkit/plugins/webplugininfo.h"
 
 using content::BrowserThread;
 using content::PluginService;
 
 PluginStatusPrefSetter::PluginStatusPrefSetter()
     : profile_(NULL),
       ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)) {}
 
 PluginStatusPrefSetter::~PluginStatusPrefSetter() {
 }
 
-void PluginStatusPrefSetter::Init(Profile* profile,
-                                  PrefObserver* observer) {
+void PluginStatusPrefSetter::Init(
+    Profile* profile,
+    const BooleanPrefMember::NamedChangeCallback& observer) {
   clear_plugin_lso_data_enabled_.Init(prefs::kClearPluginLSODataEnabled,
                                       profile->GetPrefs(), observer);
   pepper_flash_settings_enabled_.Init(prefs::kPepperFlashSettingsEnabled,
                                       profile->GetPrefs(), observer);
   profile_ = profile;
   registrar_.Add(this, chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
                  content::Source<Profile>(profile));
   StartUpdate();
 }
 
@@ skipping 20 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   // Set the values on the PrefService instead of through the PrefMembers to
   // notify observers if they changed.
   profile_->GetPrefs()->SetBoolean(
       clear_plugin_lso_data_enabled_.GetPrefName().c_str(),
       PluginDataRemoverHelper::IsSupported(plugin_prefs));
   profile_->GetPrefs()->SetBoolean(
       pepper_flash_settings_enabled_.GetPrefName().c_str(),
       PepperFlashSettingsManager::IsPepperFlashInUse(plugin_prefs, NULL));
 }