Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/css/FontFaceSet.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 389 matching lines @@
         return;
 
     // If the layout was invalidated in between when we thought layout
     // was updated and when we're ready to fire the event, just wait
     // until after the next layout before firing events.
     Document* d = document();
     if (!d->view() || d->view()->needsLayout())
         return;
 
     if (hasLoadedFonts()) {
-        RefPtr<CSSFontFaceLoadEvent> doneEvent;
-        RefPtr<CSSFontFaceLoadEvent> errorEvent;
+        RefPtrWillBeRawPtr<CSSFontFaceLoadEvent> doneEvent = nullptr;
+        RefPtrWillBeRawPtr<CSSFontFaceLoadEvent> errorEvent = nullptr;

[haraken, 2014/04/03 10:39:31]

These '= nullptr's were necessary.

         doneEvent = CSSFontFaceLoadEvent::createForFontFaces(EventTypeNames::loadingdone, m_loadedFonts);
         m_loadedFonts.clear();
         if (!m_failedFonts.isEmpty()) {
             errorEvent = CSSFontFaceLoadEvent::createForFontFaces(EventTypeNames::loadingerror, m_failedFonts);
             m_failedFonts.clear();
         }
         dispatchEvent(doneEvent);
         if (errorEvent)
             dispatchEvent(errorEvent);
     }
@@ skipping 144 matching lines @@
 }
 
 void FontFaceSet::didLayout(Document& document)
 {
     if (FontFaceSet* fonts = static_cast<FontFaceSet*>(SupplementType::from(document, supplementName())))
         fonts->didLayout();
 }
 
 
 } // namespace WebCore