[Mac] Delete old balloon and Notification Center notification implementations.

chrome/browser/notifications/notification_ui_manager.cc

Index: chrome/browser/notifications/notification_ui_manager.cc
diff --git a/chrome/browser/notifications/notification_ui_manager.cc b/chrome/browser/notifications/notification_ui_manager.cc
index 19e6c242d0ba1d99fff69808727fa782338d515e..d6c0f0f0aa33b36b932c0918bf5bf5f991615e1b 100644
--- a/chrome/browser/notifications/notification_ui_manager.cc
+++ b/chrome/browser/notifications/notification_ui_manager.cc
@@ -25,7 +25,6 @@ bool NotificationUIManager::DelegatesToMessageCenter() {
   return message_center::IsRichNotificationEnabled();
 }
 
-#if !defined(OS_MACOSX)
 // static
 NotificationUIManager* NotificationUIManager::Create(PrefService* local_state) {
   if (DelegatesToMessageCenter()) {
@@ -39,9 +38,13 @@ NotificationUIManager* NotificationUIManager::Create(PrefService* local_state) {
         settings_provider.Pass());
   }
 
+#if defined(OS_MACOSX)
+  NOTREACHED();
+  return NULL;
+#else
   BalloonNotificationUIManager* balloon_manager =
       new BalloonNotificationUIManager(local_state);
   balloon_manager->SetBalloonCollection(BalloonCollection::Create());
   return balloon_manager;
-}
 #endif
+}