Remove FrameDetached and FrameWillClose listeners from AutofillAgent.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index ade467c2db4199c89f073099c6f3f800d196224c..0ef51f38e4c6732fd63cde7be64410ca3fbce116 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1997,6 +1997,7 @@ void RenderFrameImpl::frameDetached(blink::WebFrame* frame) {
   // have IPCs fired off.
   is_detaching_ = true;
 
+  FOR_EACH_OBSERVER(RenderFrameObserver, observers_, FrameDetached());
   FOR_EACH_OBSERVER(RenderViewObserver, render_view_->observers(),
                     FrameDetached(frame));