Try to fix the Qt build.

        * kjs/DateMath.cpp:
        (KJS::msToGregorianDateTime): Removed unnecessary "struct" keyword.
        * kjs/DateMath.h: Moved forward declarations to the top of the file
        before they are used.
        * kjs/date_object.cpp:
        (KJS::formatLocaleDate): Changed to take a const GregorianDateTime&
        since GregorianDateTime is Noncopyable.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@19945 268f45cc-cd09-0410-ab3c-d52691b4dbfc