Reviewed by Darin.

    Reviewed by Darin.

        http://bugs.webkit.org/show_bug.cgi?id=13190
        XPath incorrectly handles namespaces on attributes

WebCore:
        * xml/XPathStep.cpp:
        (WebCore::XPath::Step::nodesInAxis): Added a special case for faster attribute lookup; gives a slight but
        measurable performance improvement for bug 13021.
        (WebCore::XPath::Step::nodeMatches): Fixed NameTest for attribute nodes.

        * xml/XPathStep.h:
        (WebCore::XPath::Step::NodeTest::NodeTest):
        (WebCore::XPath::Step::NodeTest::namespaceURI):
        (WebCore::XPath::Step::nodeTest):
        (WebCore::XPath::Step::setNodeTest):
        Move m_namespaceURI to NodeTest, where it belongs. Removed unused m_nodeTestData (oops!).

        * xml/XPathGrammar.y:
        * xml/XPathPath.cpp:
        (WebCore::XPath::LocationPath::optimizeStepPair):
        Accounted for the above change.

LayoutTests:
        * fast/xpath/attr-namespace-expected.txt: Added.
        * fast/xpath/attr-namespace.html: Added.

        * fast/xpath/xpath-namespaces-expected.txt:
        * fast/xpath/xpath-namespaces.html:
        Cleaned up; added a couple more cases (which passed anyway, but weren't tested for).

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@20554 268f45cc-cd09-0410-ab3c-d52691b4dbfc