Add GetMessageHandlers to HtmlDialogUIDelegate to allow...

chrome/browser/dom_ui/downloads_dom_handler.h

Index: chrome/browser/dom_ui/downloads_dom_handler.h
===================================================================
--- chrome/browser/dom_ui/downloads_dom_handler.h	(revision 19317)
+++ chrome/browser/dom_ui/downloads_dom_handler.h	(working copy)
@@ -19,11 +19,14 @@
                             public DownloadManager::Observer,
                             public DownloadItem::Observer {
  public:
-  explicit DownloadsDOMHandler(DOMUI* dom_ui, DownloadManager* dlm);
+  explicit DownloadsDOMHandler(DownloadManager* dlm);
   virtual ~DownloadsDOMHandler();
 
   void Init();
 
+  // DOMMessageHandler implementation.
+  virtual void RegisterMessages();
+
   // DownloadItem::Observer interface
   virtual void OnDownloadUpdated(DownloadItem* download);
   virtual void OnDownloadOpened(DownloadItem* download) { }