Reviewed by Cameron Zwarich.
        
        - fix layout test failure introduced by fix for 20849
        
        (The failing test was fast/js/delete-then-put.html)

        * kjs/JSObject.cpp:
        (JSC::JSObject::removeDirect): Clear enumeration cache
        in the dictionary case.
        * kjs/JSObject.h:
        (JSC::JSObject::putDirect): Ditto.
        * kjs/StructureID.h:
        (JSC::StructureID::clearEnumerationCache): Inline to handle the
        clear.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@36436 268f45cc-cd09-0410-ab3c-d52691b4dbfc