Hollow out more of the tracing system in oilpan

sky/engine/core/css/FontFace.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 531 matching lines @@
 
     RefPtr<SharedBuffer> buffer = SharedBuffer::create(data, size);
     OwnPtr<BinaryDataFontFaceSource> source = adoptPtr(new BinaryDataFontFaceSource(buffer.get()));
     if (source->isValid())
         setLoadStatus(Loaded);
     else
         setError(DOMException::create(SyntaxError, "Invalid font data in ArrayBuffer."));
     m_cssFontFace->addSource(source.release());
 }
 
-void FontFace::trace(Visitor* visitor)
-{
-    visitor->trace(m_src);
-    visitor->trace(m_style);
-    visitor->trace(m_weight);
-    visitor->trace(m_stretch);
-    visitor->trace(m_unicodeRange);
-    visitor->trace(m_variant);
-    visitor->trace(m_featureSettings);
-    visitor->trace(m_error);
-    visitor->trace(m_loadedProperty);
-    visitor->trace(m_cssFontFace);
-    visitor->trace(m_callbacks);
-}
-
 bool FontFace::hadBlankText() const
 {
     return m_cssFontFace->hadBlankText();
 }
 
 } // namespace blink