Fix for 4109667, sIFR flash replacement technique often malfunctions. This bug...

	Fix for 4109667, sIFR flash replacement technique often malfunctions.  This bug occurs when the plugin
	widget update causes the onload for the document to fire.  Because you can be in the middle of a style
	recalc when doing an attach (in response to a stylesheet load), the onload fires in the middle of the attach
	process when the tree is in a bogus state.

	The fix is to add a bit to the document that tells style recalc that the implicitClose() method was invoked
	during the style recalc process and the code has been patched so that when this situation occurs, the close is
	deferred until after the style recalc has finished.

        Reviewed by John Sullivan

        * khtml/xml/dom_docimpl.cpp:
        (DocumentImpl::DocumentImpl):
        (DocumentImpl::recalcStyle):
        (DocumentImpl::implicitClose):
        * khtml/xml/dom_docimpl.h:
        * layout-tests/fast/dynamic/flash-replacement-test.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9126 268f45cc-cd09-0410-ab3c-d52691b4dbfc