Reviewed by Darin.
        
        Re-landing test case for:
        - various event cleanup, including fixing of the load event for iframes
        http://bugzilla.opendarwin.org/show_bug.cgi?id=7079

        * fast/events/iframe-object-onload-expected.txt: Added.
        * fast/events/iframe-object-onload.html: Added.
        
        - changed expected results and description for this test, unload should
        not fire in this case:
        
        * fast/events/onunload-body-property-expected.txt: 
        * fast/events/onunload-body-property.html:
        
        - changed from UTF-16 to ASCII, there was no reason for this to be UTF-16.

        * fast/dom/attr_dead_doc.html:

WebCore:

        Reviewed by Darin.
        
        Re-landed the following with more fixes so it does not break tests:

        - various event cleanup, including fixing of the load event for iframes
        http://bugzilla.opendarwin.org/show_bug.cgi?id=7079
        
        Specific changes:
        
        - don't bother to nil-check the document, a node can never have a null document now
        - move temp event forgetting from dispatchEvent to dispatchGenericEvent
        - pass event down using RefPtr::release() to avoid ref thrashing
        - support default handlers even for non-bubbling events (only on
          target node) and skip calling default event handler explicitly in
          callers
        - dispatch a whole separate load event to a frame document's containing frame
        - don't let propagationStopped prevent this new event
        - remove bogus security check for iframe onload
        - dispatch window events on the document, not the body, and also for non-html
        - set onload, onunload, onbeforeunload from frameset tags on the window object
        - don't restrict load/unload events to HTML
        - send default handler to the dispatch object as previously

        * bridge/mac/MacFrame.mm:
        (WebCore::MacFrame::shouldClose):
        * khtml/html/html_baseimpl.cpp:
        (WebCore::HTMLFrameElementImpl::parseMappedAttribute):
        (WebCore::HTMLFrameSetElementImpl::parseMappedAttribute):
        * khtml/xml/DocumentImpl.cpp:
        (WebCore::DocumentImpl::implicitClose):
        * khtml/xml/NodeImpl.cpp:
        (WebCore::NodeImpl::dispatchEvent):
        (WebCore::NodeImpl::dispatchGenericEvent):
        (WebCore::NodeImpl::dispatchWindowEvent):
        * khtml/xml/NodeImpl.h:
        * page/Frame.cpp:
        (WebCore::Frame::stopLoading):
        (WebCore::Frame::setWindowHasFocus):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@12587 268f45cc-cd09-0410-ab3c-d52691b4dbfc