https://bugs.webkit.org/show_bug.cgi?id=33787
        Add constants for more XML strings

        No change in functionality, so no tests.

        * WebCore/xml/xmlnsattrs.in: Added a new file for xmlns namespace and attribute - 
        XMLNames.{h,cpp} are auto-generated, and I dodn't see a reasonable way to extend it.

        * platform/text/AtomicString.cpp: (WebCore::AtomicString::init):
        * platform/text/AtomicString.h:
        Added atomic strings for "xml" and "xmlns".

        * page/Frame.cpp: (WebCore::Frame::Frame): Call XMLNSNames::init().

        * dom/Attr.cpp: (WebCore::Attr::setPrefix):
        * dom/Document.cpp:
        (WebCore::Document::hasPrefixNamespaceMismatch):
        (WebCore::Document::createAttributeNS):
        * dom/Node.cpp:
        (WebCore::Node::checkSetPrefix):
        (WebCore::Node::isDefaultNamespace):
        (WebCore::Node::lookupNamespaceURI):
        (WebCore::Node::lookupNamespacePrefix):
        * dom/XMLTokenizerLibxml2.cpp:
        (WebCore::XMLTokenizer::XMLTokenizer):
        (WebCore::handleElementNamespaces):
        * editing/markup.cpp:
        (WebCore::shouldAddNamespaceAttr):
        (WebCore::appendNamespace):
        * xml/XPathStep.cpp:
        (WebCore::XPath::nodeMatchesBasicTest):
        (WebCore::XPath::Step::nodesInAxis):
        Use the new constants.

        * Android.derived.mk:
        * DerivedSources.make:
        * GNUmakefile.am:
        * WebCore.gyp/WebCore.gyp:
        * WebCore.pri:
        * WebCore.vcproj/WebCore.vcproj:
        * WebCore.xcodeproj/project.pbxproj:
        * WebCoreSources.bkl:
        Added the new files to projects.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@53429 268f45cc-cd09-0410-ab3c-d52691b4dbfc