Fixed: <rdar://problem/3498680> switching back and forth between tabs stops calling anything in a plug-in

        Reviewed by darin.

        * Plugins.subproj/WebBaseNetscapePluginView.m:
        (-[WebBaseNetscapePluginView sendEvent:]): call setWindowIfNecessary because the window may have changed
        (-[WebBaseNetscapePluginView updateAndSetWindow]): new
        (-[WebBaseNetscapePluginView setWindowIfNecessary]): was setWindow, this method now just sets the window
        (-[WebBaseNetscapePluginView start]): call updateAndSetWindow
        (-[WebBaseNetscapePluginView viewDidMoveToWindow]): ditto
        (-[WebBaseNetscapePluginView viewHasMoved:]): ditto


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@7741 268f45cc-cd09-0410-ab3c-d52691b4dbfc