Reviewed by Adam.

    Reviewed by Adam.

        - Fixed "FIXME: Violates Liskov Substitution principle."

        IFRAME was never a true subclass of FRAME, since they disagreed on a
        number of behaviors, which, confusingly, IFRAME just overrode and contradicted.

        The fix here is to factor out things common to IFRAME and FRAME into a
        common base class, HTMLFrameElementBase.

        I also changed some " *" to "* " and added #includes in files that implicitly
        assumed that HTMLIFrameElement.h #included HTMLFrameElement.h.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17090 268f45cc-cd09-0410-ab3c-d52691b4dbfc