Reviewed by Adam and Geoff.

        - Added a new cast so all the casts are in the same place.

        * API/APICast.h:
        (toGlobalRef):

win:

        Reviewed by Adam and Geoff.

        - Added the globalContext method so Drosera can ask a WebFrame for its
        context.

        * Interfaces/IWebFrame.idl:
        * WebFrame.cpp:
        * WebFrame.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27275 268f45cc-cd09-0410-ab3c-d52691b4dbfc