Destroy the TaskManagerGtk singleton instance when its window is destroyed, o...

chrome/browser/gtk/task_manager_gtk.h

Index: chrome/browser/gtk/task_manager_gtk.h
===================================================================
--- chrome/browser/gtk/task_manager_gtk.h	(revision 30657)
+++ chrome/browser/gtk/task_manager_gtk.h	(working copy)
@@ -69,6 +69,9 @@
   gint CompareImpl(GtkTreeModel* tree_model, GtkTreeIter* a,
                    GtkTreeIter* b, int id);
 
+  // response signal handler that notifies us of dialog destruction.
+  static void OnDestroy(GtkDialog* dialog, TaskManagerGtk* task_manager);
+
   // response signal handler that notifies us of dialog responses.
   static void OnResponse(GtkDialog* dialog, gint response_id,
                          TaskManagerGtk* task_manager);
@@ -193,6 +196,9 @@
   // The number of processes in |process_list_|.
   int process_count_;
 
+  // The id of the |dialog_| destroy signal handler.
+  gulong destroy_handler_id_;
+
   // The context menu controller.
   scoped_ptr<ContextMenuController> menu_controller_;