Convert NOTIFICATION_TEMPLATE_URL_SERVICE_LOADED to CallbackList

chrome/browser/sync/glue/search_engine_data_type_controller.cc

Index: chrome/browser/sync/glue/search_engine_data_type_controller.cc
diff --git a/chrome/browser/sync/glue/search_engine_data_type_controller.cc b/chrome/browser/sync/glue/search_engine_data_type_controller.cc
index 9718b23ccdb54638e3e523f1cc4334e65e7772b0..351fe6d7dfd41aa8fc5a828b32699542db72d65c 100644
--- a/chrome/browser/sync/glue/search_engine_data_type_controller.cc
+++ b/chrome/browser/sync/glue/search_engine_data_type_controller.cc
@@ -5,13 +5,10 @@
 #include "chrome/browser/sync/glue/search_engine_data_type_controller.h"
 
 #include "base/metrics/histogram.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/sync/profile_sync_components_factory.h"
 #include "chrome/browser/sync/profile_sync_service.h"
-#include "content/public/browser/notification_source.h"
 #include "sync/api/syncable_service.h"
 
 using content::BrowserThread;
@@ -28,17 +25,6 @@ SearchEngineDataTypeController::SearchEngineDataTypeController(
                            sync_service) {
 }
 
-void SearchEngineDataTypeController::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK_EQ(chrome::NOTIFICATION_TEMPLATE_URL_SERVICE_LOADED, type);
-  registrar_.RemoveAll();
-  DCHECK_EQ(state_, MODEL_STARTING);
-  OnModelLoaded();
-}
-
 SearchEngineDataTypeController::~SearchEngineDataTypeController() {}
 
 // We want to start the TemplateURLService before we begin associating.
@@ -54,15 +40,19 @@ bool SearchEngineDataTypeController::StartModels() {
     return true;  // Continue to Associate().
   }
 
-  // Add an observer and continue when the TemplateURLService is loaded.
-  registrar_.Add(this, chrome::NOTIFICATION_TEMPLATE_URL_SERVICE_LOADED,
-                 content::Source<TemplateURLService>(turl_service));
+  // Register a callback and continue when the TemplateURLService is loaded.
+  template_url_subscription_ = turl_service->RegisterOnLoadedCallback(
+      base::Bind(&SearchEngineDataTypeController::OnTemplateURLServiceLoaded,
+                 this));
+
   return false;  // Don't continue Start.
 }
 
-// Cleanup for our extra registrar usage.
-void SearchEngineDataTypeController::StopModels() {
-  registrar_.RemoveAll();
+void SearchEngineDataTypeController::OnTemplateURLServiceLoaded() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_EQ(state_, MODEL_STARTING);
+  template_url_subscription_.reset();
+  OnModelLoaded();
 }
 
 }  // namespace browser_sync