Fix for object element to support fallback content. WIth this change Safari passes...

	Fix for object element to support fallback content.  WIth this change Safari passes the Acid2 test.

        Reviewed by Maciej

        * khtml/css/html4.css:
        * khtml/html/html_objectimpl.cpp:
        (HTMLObjectElementImpl::HTMLObjectElementImpl):
        (HTMLObjectElementImpl::parseHTMLAttribute):
        (HTMLObjectElementImpl::rendererIsNeeded):
        (HTMLObjectElementImpl::createRenderer):
        (HTMLObjectElementImpl::attach):
        (HTMLObjectElementImpl::detach):
        (HTMLObjectElementImpl::recalcStyle):
        (HTMLObjectElementImpl::childrenChanged):
        (HTMLObjectElementImpl::isURLAttribute):
        (HTMLObjectElementImpl::isImageType):
        (HTMLObjectElementImpl::renderFallbackContent):
        * khtml/html/html_objectimpl.h:
        * khtml/khtml_part.cpp:
        (KHTMLPart::requestObject):
        (KHTMLPart::selectFrameElementInParentIfFullySelected):
        (KHTMLPart::handleFallbackContent):
        * khtml/khtml_part.h:
        * khtml/khtmlpart_p.h:
        (khtml::ChildFrame::ChildFrame):
        * khtml/rendering/render_frames.cpp:
        (RenderPartObject::RenderPartObject):
        (RenderPartObject::updateWidget):
        * khtml/rendering/render_frames.h:
        (khtml::RenderPart::hasFallbackContent):
        * khtml/rendering/render_replaced.cpp:
        (RenderReplaced::RenderReplaced):
        * kwq/KWQKHTMLPart.mm:
        (KWQKHTMLPart::createPart):
        * kwq/WebCoreBridge.h:
        * kwq/WebCoreBridge.mm:
        (-[WebCoreBridge mainResourceError]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9095 268f45cc-cd09-0410-ab3c-d52691b4dbfc