Move NotificationDelegate into message_center.

ui/message_center/views/message_popup_collection_unittest.cc

Index: ui/message_center/views/message_popup_collection_unittest.cc
diff --git a/ui/message_center/views/message_popup_collection_unittest.cc b/ui/message_center/views/message_popup_collection_unittest.cc
index ea6d1be0e1a3942b0de7479ed4aa0b7dbb0078b8..a032aaf0f656b1231500527d82e93d85b91d52ce 100644
--- a/ui/message_center/views/message_popup_collection_unittest.cc
+++ b/ui/message_center/views/message_popup_collection_unittest.cc
@@ -68,10 +68,14 @@ class MessagePopupCollectionTest : public views::ViewsTestBase {
 
   std::string AddNotification() {
     std::string id = base::IntToString(id_++);
-    MessageCenter::Get()->AddNotification(
-        NOTIFICATION_TYPE_BASE_FORMAT, id, UTF8ToUTF16("test title"),
-        UTF8ToUTF16("test message"), string16() /* display_source */,
-        "" /* extension_id */, NULL);
+    MessageCenter::Get()->AddNotification(NOTIFICATION_TYPE_BASE_FORMAT,
+                                          id,
+                                          UTF8ToUTF16("test title"),
+                                          UTF8ToUTF16("test message"),
+                                          string16() /* display_source */,
+                                          "" /* extension_id */,
+                                          NULL /* optional_fields */,
+                                          NULL /* delegate */);
     return id;
   }