Switch DomAutomationController to be a RenderFrameObserver.

content/browser/frame_host/interstitial_page_impl.h

Index: content/browser/frame_host/interstitial_page_impl.h
diff --git a/content/browser/frame_host/interstitial_page_impl.h b/content/browser/frame_host/interstitial_page_impl.h
index 5415fc98d81ee0e45ad4278b07e491719e08b184..a7374a2a27bd2f8d8831d71fcd0bf98f03ad27f4 100644
--- a/content/browser/frame_host/interstitial_page_impl.h
+++ b/content/browser/frame_host/interstitial_page_impl.h
@@ -13,6 +13,7 @@
 #include "content/browser/frame_host/render_frame_host_delegate.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
+#include "content/public/browser/dom_operation_notification_details.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -110,6 +111,8 @@ class CONTENT_EXPORT InterstitialPageImpl
 
   // RenderFrameHostDelegate implementation:
   virtual void RenderFrameCreated(RenderFrameHost* render_frame_host) OVERRIDE;
+  virtual void OnDomOperationResponse(
+      const DomOperationNotificationDetails& details) OVERRIDE;
 
   // RenderViewHostDelegate implementation:
   virtual RenderViewHostDelegateView* GetDelegateView() OVERRIDE;