Fix for this bug:

	Radar 3128159 (Netscape non-standard DOM event attribute "which" unsupported)

        * khtml/dom/dom2_events.cpp:
        (UIEvent::which): Added which() definition.
        * khtml/dom/dom2_events.h: Added declarations for which() functions in UIEvent.
        * khtml/ecma/kjs_events.cpp:
        (DOMUIEvent::getValueProperty): Added which property.
        * khtml/ecma/kjs_events.h: Ditto.
        * khtml/ecma/kjs_events.lut.h: File regenerated.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@3052 268f45cc-cd09-0410-ab3c-d52691b4dbfc