Add done-clicked notification to content settings bubble model.

chrome/browser/ui/gtk/content_setting_bubble_gtk.cc

 // Copyright (c) 2012 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/ui/gtk/content_setting_bubble_gtk.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 286 matching lines @@
     if (widget == *i) {
       content_setting_bubble_model_->OnRadioClicked(
           i - radio_group_gtk_.begin());
       return;
     }
   }
   NOTREACHED() << "unknown radio toggled";
 }
 
 void ContentSettingBubbleGtk::OnCloseButtonClicked(GtkWidget *button) {
+  content_setting_bubble_model_->OnDoneClicked();
   Close();
 }
 
 void ContentSettingBubbleGtk::OnCustomLinkClicked(GtkWidget* button) {
   content_setting_bubble_model_->OnCustomLinkClicked();
   Close();
 }
 
 void ContentSettingBubbleGtk::OnManageLinkClicked(GtkWidget* button) {
   content_setting_bubble_model_->OnManageLinkClicked();
   Close();
 }