When Reload was selected from the context menu in the Inspector, the
        Inspector window would close and never be openable again. Now it
        closes, then reopens when the page finishes loading.

        Reviewed by Tim Hatcher.

        * page/InspectorController.cpp:
        (WebCore::InspectorController::close): Removed code that cleared out
        m_page. This is now handled by pageDestroyed.
        * page/InspectorController.h:
        (WebCore::InspectorController::inspectedPageDestroyed): Added.
        * page/Page.cpp:
        (WebCore::Page::~Page): Fixed a bug and added a call to the new
        inspectedPageDestroyed. If we have a parent InspectorController, that
        means that we are the Page in the Inspector's window (i.e., we are the
        Inspector's UI), so when we are destroyed we should call
        InspectorController::pageDestroyed. We also need to call
        inspectedPageDestroyed on our own InspectorController so that it won't
        try to call into us.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@33447 268f45cc-cd09-0410-ab3c-d52691b4dbfc