Support type selector for camel-cased SVG elements in HTML.

Source/core/dom/Element.h

 /*
  * 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)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 221 matching lines @@
     bool hasTagName(const HTMLQualifiedName& tagName) const { return ContainerNode::hasTagName(tagName); }
     bool hasTagName(const SVGQualifiedName& tagName) const { return ContainerNode::hasTagName(tagName); }
 
     // Should be called only by Document::createElementNS to fix up m_tagName immediately after construction.
     void setTagNameForCreateElementNS(const QualifiedName&);
 
     // A fast function for checking the local name against another atomic string.
     bool hasLocalName(const AtomicString& other) const { return m_tagName.localName() == other; }
 
     virtual const AtomicString& localName() const override final { return m_tagName.localName(); }
+    AtomicString localNameForSelectorMatching() const;
     const AtomicString& prefix() const { return m_tagName.prefix(); }
     virtual const AtomicString& namespaceURI() const override final { return m_tagName.namespaceURI(); }
 
     const AtomicString& locateNamespacePrefix(const AtomicString& namespaceURI) const;
 
     virtual KURL baseURI() const override final;
 
     virtual String nodeName() const override;
 
     PassRefPtrWillBeRawPtr<Element> cloneElementWithChildren();
@@ skipping 587 matching lines @@
 }
 
 inline void Element::setTagNameForCreateElementNS(const QualifiedName& tagName)
 {
     // We expect this method to be called only to reset the prefix.
     ASSERT(tagName.localName() == m_tagName.localName());
     ASSERT(tagName.namespaceURI() == m_tagName.namespaceURI());
     m_tagName = tagName;
 }
 
+inline AtomicString Element::localNameForSelectorMatching() const
+{
+    if (isHTMLElement() || !document().isHTMLDocument())
+        return localName();
+    return localName().lower();
+}
+
 inline bool isShadowHost(const Node* node)
 {
     return node && node->isElementNode() && toElement(node)->shadow();
 }
 
 inline bool isShadowHost(const Node& node)
 {
     return node.isElementNode() && toElement(node).shadow();
 }
 
@@ skipping 40 matching lines @@
     static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRefWillBeNoop(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif // Element_h