Hollow out more of the tracing system in oilpan

sky/engine/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 44 matching lines @@
     {
         return adoptRef(new LoadFontPromiseResolver(faces, scriptState));
     }
 
     void loadFonts(ExecutionContext*);
     ScriptPromise promise() { return m_resolver->promise(); }
 
     virtual void notifyLoaded(FontFace*) override;
     virtual void notifyError(FontFace*) override;
 
-    virtual void trace(Visitor*) override;
-
 private:
     LoadFontPromiseResolver(FontFaceArray faces, ScriptState* scriptState)
         : m_numLoading(faces.size())
         , m_errorOccured(false)
         , m_resolver(ScriptPromiseResolver::create(scriptState))
     {
         m_fontFaces.swap(faces);
     }
 
     Vector<RefPtr<FontFace> > m_fontFaces;
@@ skipping 24 matching lines @@
 
 void LoadFontPromiseResolver::notifyError(FontFace* fontFace)
 {
     m_numLoading--;
     if (!m_errorOccured) {
         m_errorOccured = true;
         m_resolver->reject(fontFace->error());
     }
 }
 
-void LoadFontPromiseResolver::trace(Visitor* visitor)
-{
-    visitor->trace(m_fontFaces);
-    LoadFontCallback::trace(visitor);
-}
-
 class FontsReadyPromiseResolver {
 public:
     static PassOwnPtr<FontsReadyPromiseResolver> create(ScriptState* scriptState)
     {
         return adoptPtr(new FontsReadyPromiseResolver(scriptState));
     }
 
     void resolve(PassRefPtr<FontFaceSet> fontFaceSet)
     {
         m_resolver->resolve(fontFaceSet);
@@ skipping 454 matching lines @@
 
     return fonts.release();
 }
 
 void FontFaceSet::didLayout(Document& document)
 {
     if (FontFaceSet* fonts = static_cast<FontFaceSet*>(SupplementType::from(document, supplementName())))
         fonts->didLayout();
 }
 
-#if ENABLE(OILPAN)
-void FontFaceSet::trace(Visitor* visitor)
-{
-    visitor->trace(m_loadingFonts);
-    visitor->trace(m_loadedFonts);
-    visitor->trace(m_failedFonts);
-    visitor->trace(m_nonCSSConnectedFaces);
-    DocumentSupplement::trace(visitor);
-    EventTargetWithInlineData::trace(visitor);
-}
-#endif
-
 } // namespace blink