Reviewed by Ken.

    Reviewed by Ken.

        - moved markup-related functions into new sources files in the editing directory
        - removed all of the uses of dynamic_cast, preparing to turn off RTTI to make our code smaller and slightly faster

        * ForwardingHeaders/editing/markup.h: Added.
        * khtml/editing/markup.h: Added.
        * khtml/editing/markup.cpp: Added.

        * WebCore.pbproj/project.pbxproj: Added markup.h/cpp.

        * khtml/dom/dom_node.cpp: (Node::toHTML): Call createMarkup since there's no toHTML in NodeImpl any more.
        * khtml/html/html_elementimpl.cpp:
        (HTMLElementImpl::innerHTML): Changed to call createMarkup.
        (HTMLElementImpl::outerHTML): Ditto.

        * khtml/ecma/kjs_window.cpp:
        (Window::retrieveWindow): Comment out assert that uses dynamic_cast.
        (Window::retrieveActive): Ditto.

        * khtml/editing/htmlediting.h: Added forward class declaration needed now that I removed one elsewhere.
        * khtml/xml/dom_docimpl.h: Ditto.

        * khtml/khtml_part.cpp:
        (KHTMLPart::slotDebugDOMTree): Use createMarkup instead of toHTML.
        (KHTMLPart::processObjectRequest): Use inherits instead of dynamic_cast.

        * khtml/rendering/render_image.cpp: (RenderImage::paint): Add an explicit QChar conversion so this code
        still works even with the additional replace overloads added to QString.
        * kwq/KWQTextCodec.mm: (QTextCodec::fromUnicode): Ditto.

        * khtml/rendering/render_object.h: Removed the version of arenaDelete that does not take an object
        base pointer, because it used dynamic_cast in its implementation. Made the other version public.
        * khtml/rendering/render_object.cpp: Ditto.
        * khtml/rendering/render_replaced.cpp: (RenderWidget::deref): Pass object base pointer to arenaDelete.

        * khtml/xml/dom2_rangeimpl.h: Removed extra parameters from toHTML, and unneeded includes and declarations.
        * khtml/xml/dom2_rangeimpl.cpp: (DOM::RangeImpl::toHTML): Changed to call createMarkup, and moved all
        the support code into markup.cpp.

        * khtml/xml/dom_nodeimpl.h: Moved toHTML and related functions into markup.cpp.
        * khtml/xml/dom_nodeimpl.cpp: Ditto.

        * khtml/xml/dom_position.cpp:
        (DOM::startPosition): Implemented the version of this that takes a RangeImpl. Also added null checks
        so these return null positions rather than raising exceptions.
        (DOM::endPosition): Ditto.

        * khtml/khtmlview.h: Added an APPLE_CHANGES function so inherits can detect this class without dynamic_cast.
        * kwq/KWQFrame.h: Ditto.
        * kwq/KWQFrame.mm: (QFrame::isQFrame): Ditto.
        * kwq/KWQKPartsPart.h: Ditto.
        * kwq/KWQKPartsPart.mm: (KParts::ReadOnlyPart::isKPartsReadOnlyPart): Ditto.
        * kwq/KWQScrollView.h: Ditto.
        * kwq/KWQScrollView.mm: (QScrollView::isQScrollView): Ditto.
        * kwq/KWQKHTMLPart.h: Ditto.
        * kwq/KWQKHTMLPart.mm:
        (KHTMLView::isKHTMLView): Ditto.
        (KWQKHTMLPart::setTitle): Added an explicit QChar conversion so this code still works even with the additional
        replace overloads added to QString.
        (KWQKHTMLPart::setStatusBarText): Ditto.
        (KWQKHTMLPart::runJavaScriptAlert): Ditto.
        (KWQKHTMLPart::runJavaScriptConfirm): Ditto.
        (KWQKHTMLPart::runJavaScriptPrompt): Ditto.
        (KWQKHTMLPart::attributedString): Ditto.
        (KWQKHTMLPart::isCharacterSmartReplaceExempt): Ditto.
        (KWQKHTMLPart::isKHTMLPart): That dynamic_cast thing (see above).

        * kwq/KWQObject.h: Added virtual methods for the few cases where we need dynamic_cast-like behavior.
        * kwq/KWQObject.mm:
        (QObject::inherits): Changed to not use dynamic cast.
        (QObject::isKHTMLPart): Added. Returns false.
        (QObject::isKHTMLView): Ditto.
        (QObject::isKPartsReadOnlyPart): Ditto.
        (QObject::isQFrame): Ditto.
        (QObject::isQScrollView): Ditto.

        * kwq/KWQRenderTreeDebug.cpp:
        (write): Changed to use inherits rather than dynamic_cast.
        (writeSelection): Ditto.

        * kwq/KWQSlot.mm: (KWQSlot::call): Call through to the version with just a job pointer parameter rather
        than going straight on to the "no parameters at all" version.

        * kwq/KWQString.h:
        * kwq/KWQString.mm: (QString::replace): Added overloads.
        * kwq/WebCoreBridge.mm:
        (-[WebCoreBridge markupStringFromNode:nodes:]): Changed to call functions in markup.h.
        (-[WebCoreBridge markupStringFromRange:nodes:]): Ditto.
        (-[WebCoreBridge selectedString]): Added an explicit QChar conversion so this code still works even with
        the additional replace overloads added to QString.
        (-[WebCoreBridge stringForRange:]): Ditto.
        (-[WebCoreBridge copyDOMNode:copier:]): Changed to call functions in markup.h.
        (-[WebCoreBridge elementAtPoint:]): QChar conversion.
        (-[WebCoreBridge documentFragmentWithMarkupString:baseURLString:]): Changed to call functions in markup.h.
        (-[WebCoreBridge documentFragmentWithText:]): Changed to call functions in markup.h.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8198 268f45cc-cd09-0410-ab3c-d52691b4dbfc