Remove lots of dead virtuals from Element.

sky/engine/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1902 matching lines @@
         m_elementData = other.m_elementData->makeUniqueCopy();
 
     AttributeCollection attributes = m_elementData->attributes();
     AttributeCollection::iterator end = attributes.end();
     for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it)
         attributeChangedFromParserOrByCloning(it->name(), it->value(), ModifiedByCloning);
 }
 
 void Element::cloneDataFromElement(const Element& other)
 {
+    // FIXME(sky): Merge these.
     cloneAttributesFromElement(other);
-    copyNonAttributePropertiesFromElement(other);
 }
 
 void Element::createUniqueElementData()
 {
     if (!m_elementData)
         m_elementData = UniqueElementData::create();
     else {
         ASSERT(!m_elementData->isUnique());
         m_elementData = toShareableElementData(m_elementData)->makeUniqueCopy();
     }
@@ skipping 168 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink