Convert NOTIFICATION_TEMPLATE_URL_SERVICE_LOADED to CallbackList

chrome/browser/search_engines/template_url_service.cc

Index: chrome/browser/search_engines/template_url_service.cc
diff --git a/chrome/browser/search_engines/template_url_service.cc b/chrome/browser/search_engines/template_url_service.cc
index 02f1551a1de9d01df86414c3e862cb2e62673f69..47f43e5c87f4273f86a517ecb8510aa3c46b0da7 100644
--- a/chrome/browser/search_engines/template_url_service.cc
+++ b/chrome/browser/search_engines/template_url_service.cc
@@ -778,10 +778,18 @@ void TemplateURLService::Load() {
     load_handle_ = service_->GetKeywords(this);
   } else {
     ChangeToLoadedState();
-    NotifyLoaded();
+    on_loaded_callbacks_.Notify();
   }
 }
 
+scoped_ptr<TemplateURLService::Subscription>
+    TemplateURLService::RegisterOnLoadedCallback(
+        const base::Closure& callback) {
+  return loaded_ ?
+      scoped_ptr<TemplateURLService::Subscription>() :
+      on_loaded_callbacks_.Add(callback);
+}
+
 void TemplateURLService::OnWebDataServiceRequestDone(
     WebDataService::Handle h,
     const WDTypedResult* result) {
@@ -794,7 +802,7 @@ void TemplateURLService::OnWebDataServiceRequestDone(
     // loaded.
     load_failed_ = true;
     ChangeToLoadedState();
-    NotifyLoaded();
+    on_loaded_callbacks_.Notify();
     return;
   }
 
@@ -826,7 +834,7 @@ void TemplateURLService::OnWebDataServiceRequestDone(
   EnsureDefaultSearchProviderExists();
 
   NotifyObservers();
-  NotifyLoaded();
+  on_loaded_callbacks_.Notify();
 }
 
 string16 TemplateURLService::GetKeywordShortName(const string16& keyword,
@@ -1576,13 +1584,6 @@ void TemplateURLService::ChangeToLoadedState() {
   loaded_ = true;
 }
 
-void TemplateURLService::NotifyLoaded() {
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_TEMPLATE_URL_SERVICE_LOADED,
-      content::Source<TemplateURLService>(this),
-      content::NotificationService::NoDetails());
-}
-
 void TemplateURLService::SaveDefaultSearchProviderToPrefs(
     const TemplateURL* t_url) {
   PrefService* prefs = GetPrefs();