Remove AtomicStringImpl.

Source/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 3021 matching lines @@
     ensureElementRareData()->setHasPendingResources(true);
 }
 
 void Element::clearHasPendingResources()
 {
     ensureElementRareData()->setHasPendingResources(false);
 }
 
 struct PresentationAttributeCacheKey {
     PresentationAttributeCacheKey() : tagName(0) { }
-    AtomicStringImpl* tagName;
+    StringImpl* tagName;
     // Only the values need refcounting.
-    Vector<pair<AtomicStringImpl*, AtomicString>, 3> attributesAndValues;
+    Vector<pair<StringImpl*, AtomicString>, 3> attributesAndValues;
 };
 
 struct PresentationAttributeCacheEntry {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     PresentationAttributeCacheKey key;
     RefPtr<StylePropertySet> value;
 };
 
 typedef HashMap<unsigned, OwnPtr<PresentationAttributeCacheEntry>, AlreadyHashed> PresentationAttributeCache;
@@ skipping 199 matching lines @@
     inlineStyleChanged();
 }
 
 void Element::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
 {
     ASSERT(isStyledElement());
     if (const StylePropertySet* inlineStyle = elementData() ? elementData()->inlineStyle() : 0)
         inlineStyle->addSubresourceStyleURLs(urls, document()->elementSheet()->contents());
 }
 
-static inline bool attributeNameSort(const pair<AtomicStringImpl*, AtomicString>& p1, const pair<AtomicStringImpl*, AtomicString>& p2)
+static inline bool attributeNameSort(const pair<StringImpl*, AtomicString>& p1, const pair<StringImpl*, AtomicString>& p2)
 {
     // Sort based on the attribute name pointers. It doesn't matter what the order is as long as it is always the same.
     return p1.first < p2.first;
 }
 
 void Element::makePresentationAttributeCacheKey(PresentationAttributeCacheKey& result) const
 {
     ASSERT(isStyledElement());
     // FIXME: Enable for SVG.
     if (namespaceURI() != xhtmlNamespaceURI)
@@ skipping 297 matching lines @@
     return 0;
 }
 
 Attribute* UniqueElementData::attributeItem(unsigned index)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     return &m_attributeVector.at(index);
 }
 
 } // namespace WebCore