Move attributes-related methods from ElementData to AttributeCollection

Source/core/dom/ElementDataCache.cpp

 /*
  * Copyright (C) 2012, 2013 Apple 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 20 matching lines @@
 
 namespace WebCore {
 
 inline unsigned attributeHash(const Vector<Attribute>& attributes)
 {
     return StringHasher::hashMemory(attributes.data(), attributes.size() * sizeof(Attribute));
 }
 
 inline bool hasSameAttributes(const Vector<Attribute>& attributes, ShareableElementData& elementData)
 {
-    if (attributes.size() != elementData.attributeCount())
+    if (attributes.size() != elementData.attributes().size())
         return false;
     return !memcmp(attributes.data(), elementData.m_attributeArray, attributes.size() * sizeof(Attribute));
 }
 
 PassRefPtrWillBeRawPtr<ShareableElementData> ElementDataCache::cachedShareableElementDataWithAttributes(const Vector<Attribute>& attributes)
 {
     ASSERT(!attributes.isEmpty());
 
     ShareableElementDataCache::ValueType* it = m_shareableElementDataCache.add(attributeHash(attributes), nullptr).storedValue;
 
     // FIXME: This prevents sharing when there's a hash collision.
     if (it->value && !hasSameAttributes(attributes, *it->value))
         return ShareableElementData::createWithAttributes(attributes);
 
     if (!it->value)
         it->value = ShareableElementData::createWithAttributes(attributes);
 
     return it->value.get();
 }
 
 ElementDataCache::ElementDataCache()
 {
 }
 
 ElementDataCache::~ElementDataCache()
 {
 }
 
 }