Quickly close tabs/window with long-running unload handlers.

chrome/browser/ui/gtk/browser_window_gtk.cc

Index: chrome/browser/ui/gtk/browser_window_gtk.cc
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.cc b/chrome/browser/ui/gtk/browser_window_gtk.cc
index ce8827d6f42a563fd368c0b58defbef5cc44843f..521ef3e8350706ead003b3453aac7862a8a9c799 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.cc
+++ b/chrome/browser/ui/gtk/browser_window_gtk.cc
@@ -1449,6 +1449,13 @@ bool BrowserWindowGtk::CanClose() const {
     // down. When the tab strip is empty we'll be called back again.
     gtk_widget_hide(GTK_WIDGET(window_));
     browser_->OnWindowClosing();
+    browser_->tab_strip_model()->CloseAllTabs();
+    return false;
+  } else if (!browser_->HasCompletedUnloadProcessing()) {
+    // The browser needs to finish running unload handlers.
+    // Hide the window (so it appears to have closed immediately), and
+    // the browser will call us back again when it is ready to close.
+    gtk_widget_hide(GTK_WIDGET(window_));
     return false;
   }