2011-01-19 Aparna Nandyal <aparna.nand@wipro.com>

2011-01-19  Aparna Nandyal  <aparna.nand@wipro.com>

        Reviewed by Andreas Kling.

        [Qt] QtTestBrowser crashes when closing if Facebook is opened
        https://bugs.webkit.org/show_bug.cgi?id=52554

        QtNetworkAccessManager is created in a thread and set as
        member variable in QWebPage. When the thread is destroyed
        the object is still used. So fix will set the object to
        NULL once the thread is destroyed.

        * QtTestBrowser/launcherwindow.cpp:
        (LauncherWindow::~LauncherWindow):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76119 268f45cc-cd09-0410-ab3c-d52691b4dbfc