Switch DomAutomationController to be a RenderFrameObserver.

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
diff --git a/content/browser/frame_host/render_frame_host_delegate.h b/content/browser/frame_host/render_frame_host_delegate.h
index b6ebfa9fd35c34a5df1222edbf529c7d87133ea8..dede08f05a10dd80652b7b4e05eec5310e610873 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -14,6 +14,7 @@ class Message;
 namespace content {
 class RenderFrameHost;
 class WebContents;
+struct DomOperationNotificationDetails;
 struct ContextMenuParams;
 
 // An interface implemented by an object interested in knowing about the state
@@ -46,6 +47,11 @@ class CONTENT_EXPORT RenderFrameHostDelegate {
   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
                                const ContextMenuParams& params) {}
 
+  // A notification that the JavaScript running in the renderer has sent a value
+  // back to the browser using the DomAutomationController.
+  virtual void OnDomOperationResponse(
+      const DomOperationNotificationDetails& details) {}
+
   // Return this object cast to a WebContents, if it is one. If the object is
   // not a WebContents, returns NULL.
   virtual WebContents* GetAsWebContents();