Add GetMessageHandlers to HtmlDialogUIDelegate to allow...

chrome/browser/dom_ui/html_dialog_ui.h

Index: chrome/browser/dom_ui/html_dialog_ui.h
===================================================================
--- chrome/browser/dom_ui/html_dialog_ui.h	(revision 19317)
+++ chrome/browser/dom_ui/html_dialog_ui.h	(working copy)
@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_DOM_UI_HTML_DIALOG_UI_H_
 #define CHROME_BROWSER_DOM_UI_HTML_DIALOG_UI_H_
 
+#include <vector>
+
 #include "chrome/browser/dom_ui/dom_ui.h"
 #include "chrome/common/property_bag.h"
 #include "googleurl/src/gurl.h"
@@ -25,6 +27,13 @@
    // Get the HTML file path for the content to load in the dialog.
    virtual GURL GetDialogContentURL() const = 0;
 
+   // Get DOMMessageHandler objects to handle messages from the HTML/JS page.
+   // The handlers are used to send and receive messages from the page while it
+   // is still open.  Ownership of each handler is taken over by the DOMUI
+   // hosting the page.
+   virtual void GetDOMMessageHandlers(
+       std::vector<DOMMessageHandler*>* handlers) const = 0;
+
    // Get the size of the dialog.
    virtual void GetDialogSize(gfx::Size* size) const = 0;