- fix http://bugs.webkit.org/show_bug.cgi?id=15153
          REGRESSION: Assertion failure in FrameView::scheduleRelayout() (m_frame->view() == this)

        Back out the willRemove() part of the previous patch.
        It was incorrect and not needed to fix the bug anyway.

        * dom/Document.cpp: (WebCore::Document::detach): Remove willRemove().

        * loader/FrameLoader.cpp: (WebCore::FrameLoader::clear): Put the willRemove() call
        back here where it was originally before the previous fix.

        * history/CachedPage.cpp: (WebCore::CachedPage::clear):
        * page/Frame.cpp:
        (WebCore::Frame::setView):
        (WebCore::Frame::setDocument):
        Added FIXMEs about the fact that we call detach() on the document but not willRemove().



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@25397 268f45cc-cd09-0410-ab3c-d52691b4dbfc