Implement BrowserList::AllBrowsersClosed for Linux.

chrome/browser/browser_list_gtk.cc

Index: chrome/browser/browser_list_gtk.cc
diff --git a/chrome/browser/browser_list_gtk.cc b/chrome/browser/browser_list_gtk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..99a66dde5ad325cff1beceb31d67496da1955323
--- /dev/null
+++ b/chrome/browser/browser_list_gtk.cc
@@ -0,0 +1,23 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/browser_list.h"
+
+#include <gtk/gtk.h>
+
+void BrowserList::AllBrowsersClosed() {
+  // Close non-browser windows.
+  GList* window_list = gtk_window_list_toplevels();
+  g_list_foreach(window_list, (GFunc)g_object_ref, NULL);
+  for (GList* i = window_list; i != NULL; i = g_list_next(i)) {
+    GtkWindow* window = GTK_WINDOW(i->data);
+    // We filter by visible widgets because there are toplevel windows that if
+    // we try to destroy, we crash.  For example, trying to destroy the tooltip
+    // window or the toplevel associated with drop down windows crashes.
+    if (GTK_WIDGET_VISIBLE(GTK_WIDGET(window)))
+      gtk_widget_destroy(GTK_WIDGET(window));
+  }
+  g_list_foreach(window_list, (GFunc)g_object_unref, NULL);
+  g_list_free(window_list);
+}