Fixed by Darin, reviewed by me.

    Fixed by Darin, reviewed by me.

        Fix for <rdar://problem/4084029> designMode doesn't allow editing when iframe src = "" or = about:blank

        This change will add an HTML element for empty documents.  Now that there will be an HTMLDocument in this case,
        a body will also be created (see rdar://problem/3758785). This was preventing frames with empty documents from
        being editable.

        * khtml/html/htmlparser.cpp: (KHTMLParser::finished):

        Updated these tests to expect the HTML and BODY elements
        * layout-tests/fast/flexbox/016-expected.txt:
        * layout-tests/fast/frames/001-expected.txt:
        * layout-tests/fast/frames/002-expected.txt:
        * layout-tests/fast/frames/contentWindow_Frame-expected.txt:
        * layout-tests/fast/frames/contentWindow_iFrame-expected.txt:
        * layout-tests/fast/frames/empty-frame-src-expected.txt:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9062 268f45cc-cd09-0410-ab3c-d52691b4dbfc