Plumb opener information when creating RenderFrames and RenderFrameProxies for subframes.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index cdb56e533a78b10b12a1ad1dca3704399a510418..7297c2133a29aa7c04ecfe37d52fe4e5c2c45712 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -705,8 +705,10 @@ void RenderViewImpl::Initialize(const ViewMsg_New_Params& params,
       main_render_frame_->set_render_frame_proxy(proxy);
     } else {
       DCHECK(SiteIsolationPolicy::IsSwappedOutStateForbidden());
-      RenderFrameProxy::CreateFrameProxy(params.proxy_routing_id,
-                                         MSG_ROUTING_NONE, routing_id_,
+      // Pass MSG_ROUTING_NONE for opener, since actual opener (if any) will be
+      // set separately below.
+      RenderFrameProxy::CreateFrameProxy(params.proxy_routing_id, routing_id_,
+                                         MSG_ROUTING_NONE, MSG_ROUTING_NONE,
                                          params.replicated_frame_state);
     }
   }