Remove PrefObserver usages, batch 10.

chrome/browser/ui/webui/ntp/ntp_login_handler.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/webui/ntp/ntp_login_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 70 matching lines @@
 } // namespace
 
 NTPLoginHandler::NTPLoginHandler() {
 }
 
 NTPLoginHandler::~NTPLoginHandler() {
 }
 
 void NTPLoginHandler::RegisterMessages() {
   PrefService* pref_service = Profile::FromWebUI(web_ui())->GetPrefs();
-  username_pref_.Init(prefs::kGoogleServicesUsername, pref_service, this);
+  username_pref_.Init(prefs::kGoogleServicesUsername,
+                      pref_service,
+                      base::Bind(&NTPLoginHandler::UpdateLogin,
+                                 base::Unretained(this)));
 
   registrar_.Add(this, chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED,
                  content::NotificationService::AllSources());
 
   web_ui()->RegisterMessageCallback("initializeSyncLogin",
       base::Bind(&NTPLoginHandler::HandleInitializeSyncLogin,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("showSyncLoginUI",
       base::Bind(&NTPLoginHandler::HandleShowSyncLoginUI,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("loginMessageSeen",
       base::Bind(&NTPLoginHandler::HandleLoginMessageSeen,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("showAdvancedLoginUI",
       base::Bind(&NTPLoginHandler::HandleShowAdvancedLoginUI,
                  base::Unretained(this)));
 }
 
 void NTPLoginHandler::Observe(int type,
                               const content::NotificationSource& source,
                               const content::NotificationDetails& details) {
   if (type == chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED) {
     UpdateLogin();
   } else {
     NOTREACHED();
   }
 }
 
-void NTPLoginHandler::OnPreferenceChanged(PrefServiceBase* service,
-                                          const std::string& pref_name) {
-  if (prefs::kGoogleServicesUsername == pref_name)
-    UpdateLogin();
-}
-
 void NTPLoginHandler::HandleInitializeSyncLogin(const ListValue* args) {
   UpdateLogin();
 }
 
 void NTPLoginHandler::HandleShowSyncLoginUI(const ListValue* args) {
   Profile* profile = Profile::FromWebUI(web_ui());
   std::string username = profile->GetPrefs()->GetString(
       prefs::kGoogleServicesUsername);
   content::WebContents* web_contents = web_ui()->GetWebContents();
   Browser* browser = browser::FindBrowserWithWebContents(web_contents);
@@ skipping 139 matching lines @@
           l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME)));
   values->SetString("login_status_url",
       hide_sync ? std::string() : chrome::kSyncLearnMoreURL);
   values->SetString("login_status_advanced",
       hide_sync ? string16() :
       l10n_util::GetStringUTF16(IDS_SYNC_PROMO_NTP_BUBBLE_ADVANCED));
   values->SetString("login_status_dismiss",
       hide_sync ? string16() :
       l10n_util::GetStringUTF16(IDS_SYNC_PROMO_NTP_BUBBLE_OK));
 }