Reviewed by Darin Fisher.

        [V8] Call malloc and memcpy directly instead of
        of strdup in convertV8ObjectToNPVariant() when
        converting strings. If there is a null character
        in the string, our use of strdup causes us to allocate
        too little memory, leading to out of bounds reads.

        https://bugs.webkit.org/show_bug.cgi?id=52631

        * bindings/v8/V8NPUtils.cpp:
        (WebCore::convertV8ObjectToNPVariant):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76264 268f45cc-cd09-0410-ab3c-d52691b4dbfc