Reviewed by John Sullivan.

        - fixed http://bugzilla.opendarwin.org/show_bug.cgi?id=4758
          unify SharedPtr in WebCore and JavaScriptCore

        * kjs/shared_ptr.h: Updated namespace to KXMLCore instead of kxhmlcore.
        Made a few small improvements to use local variables a bit more and added
        an "operator int" to reduce the chance that we'll convert a SharedPtr to
        an int by accident. Also made the == operators normal functions rather than
        friend functions, added a couple of comemnts.

        * kjs/function.h: Updated for namespace change.
        * kjs/function.cpp: Ditto.
        * kjs/function_object.cpp: Ditto.
        * kjs/internal.h: Ditto.
        * kjs/internal.cpp: Ditto.
        * kjs/nodes.h: Ditto.
        * kjs/nodes2string.cpp: Ditto.

WebCore:

        Reviewed by John Sullivan.

        - fixed http://bugzilla.opendarwin.org/show_bug.cgi?id=4758
          unify SharedPtr in WebCore and JavaScriptCore

        * ForwardingHeaders/kjs/shared_ptr.h: Added.
        * khtml/misc/shared.h: Removed SharedPtr, and instead included <kjs/shared_ptr.h>
        and did some using statements to import the template into the khtml namespace.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@10399 268f45cc-cd09-0410-ab3c-d52691b4dbfc