Reviewed by Maciej.

    Reviewed by Maciej.

        - fixed <rdar://problem/3943038> <input type=search> that is focused in onload handler doesn't have a visible editor

        * khtml/xml/dom_docimpl.cpp: (DocumentImpl::setFocusNode): Always update layout before giving focus to a widget.
        This prevents the bad case where we give a widget focus before it has been positioned or sized, causing us to
        exercise edge cases AppKit doesn't handle well.

        * kwq/KWQTextField.mm: (-[KWQTextFieldController initWithTextField:QLineEdit:]): Remove workaround code I added
        to fix bug 3943049. Updating the layout fixes the same problem in a cleaner, safer way, and solves another problem,
        with the way the clip view is set up.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8533 268f45cc-cd09-0410-ab3c-d52691b4dbfc