Switch DomAutomationController to be a RenderFrameObserver.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 63aebf9cd1c2cf8540e9b5d6db3bc8fc4ec3b972..e84d9bb1b2d20375d61f94818b383c905e45c80a 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2733,6 +2733,14 @@ void WebContentsImpl::ShowContextMenu(RenderFrameHost* render_frame_host,
   render_view_host_delegate_view_->ShowContextMenu(render_frame_host, params);
 }
 
+void WebContentsImpl::OnDomOperationResponse(
+    const DomOperationNotificationDetails& details) {
+  NotificationService::current()->Notify(
+      NOTIFICATION_DOM_OPERATION_RESPONSE,
+      Source<WebContents>(this),
+      Details<const DomOperationNotificationDetails>(&details));
+}
+
 WebContents* WebContentsImpl::GetAsWebContents() {
   return this;
 }