Add done-clicked notification to content settings bubble model.

chrome/browser/ui/content_settings/content_setting_bubble_model.h

Index: chrome/browser/ui/content_settings/content_setting_bubble_model.h
diff --git a/chrome/browser/ui/content_settings/content_setting_bubble_model.h b/chrome/browser/ui/content_settings/content_setting_bubble_model.h
index 9e4377b0cf8d289978940554e89cae1bbcaf1aae..e661cdfa366d0347f2a0e9ce038ddeb3eb008871 100644
--- a/chrome/browser/ui/content_settings/content_setting_bubble_model.h
+++ b/chrome/browser/ui/content_settings/content_setting_bubble_model.h
@@ -94,6 +94,10 @@ class ContentSettingBubbleModel : public content::NotificationObserver {
   virtual void OnCustomLinkClicked() {}
   virtual void OnManageLinkClicked() {}
 
+  // Called by the view code when the bubble is closed by the user using the
+  // Done button.
+  virtual void OnDoneClicked() {}
+
  protected:
   ContentSettingBubbleModel(TabContents* tab_contents, Profile* profile,
       ContentSettingsType content_type);
@@ -163,6 +167,7 @@ class ContentSettingRPHBubbleModel : public ContentSettingTitleAndLinkModel {
                                ContentSettingsType content_type);
 
   virtual void OnRadioClicked(int radio_index) OVERRIDE;
+  virtual void OnDoneClicked() OVERRIDE;
 
  private:
   // These states must match the order of appearance of the radio buttons