http://bugs.webkit.org/show_bug.cgi?id=8791
        XPath should support custom node resolvers

WebCore:
        * bindings/js/JSCustomXPathNSResolver.cpp: Added.
        (WebCore::JSCustomXPathNSResolver::create):
        (WebCore::JSCustomXPathNSResolver::JSCustomXPathNSResolver):
        (WebCore::JSCustomXPathNSResolver::~JSCustomXPathNSResolver):
        (WebCore::JSCustomXPathNSResolver::lookupNamespaceURI):
        * bindings/js/JSCustomXPathNSResolver.h: Added.
        * bindings/objc/DOMCustomXPathNSResolver.h: Added.
        * bindings/objc/DOMCustomXPathNSResolver.mm: Added.
        (WebCore::DOMCustomXPathNSResolver::DOMCustomXPathNSResolver):
        (WebCore::DOMCustomXPathNSResolver::~DOMCustomXPathNSResolver):
        (WebCore::DOMCustomXPathNSResolver::lookupNamespaceURI):
        Wrappers for JS/ObjC objects that can be used as resolvers.

        * bindings/scripts/CodeGeneratorJS.pm:
        * bindings/scripts/CodeGeneratorObjC.pm:
        Use the above wrappers to support custom resolvers.

        * xml/XPathNSResolver.cpp:
        * xml/XPathNSResolver.h:
        Turned this class into an abstract one.

        * xml/NativeXPathNSResolver.cpp: Added.
        (WebCore::NativeXPathNSResolver::NativeXPathNSResolver):
        (WebCore::NativeXPathNSResolver::~NativeXPathNSResolver):
        (WebCore::NativeXPathNSResolver::lookupNamespaceURI):
        * xml/NativeXPathNSResolver.h: Added.
        A XPathNSResolver subclass, doing what XPathNSResolver used to do.

        * xml/XPathEvaluator.cpp:
        (WebCore::XPathEvaluator::createNSResolver): Create a NativeXPathNSResolver.

        * WebCore.xcodeproj/project.pbxproj: Added new files.

LayoutTests:
        * fast/xpath/nsresolver-bad-object-expected.txt: Added.
        * fast/xpath/nsresolver-bad-object.xhtml: Added.
        * fast/xpath/nsresolver-exception-expected.txt: Added.
        * fast/xpath/nsresolver-exception.xhtml: Added.
        * fast/xpath/nsresolver-function-expected.txt: Added.
        * fast/xpath/nsresolver-function.xhtml: Added.
        * fast/xpath/nsresolver-object-expected.txt: Added.
        * fast/xpath/nsresolver-object.xhtml: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@19398 268f45cc-cd09-0410-ab3c-d52691b4dbfc