Remove some InterfacePtr<> methods which directly deal with message pipe handles.

sky/viewer/document_view.cc

Index: sky/viewer/document_view.cc
diff --git a/sky/viewer/document_view.cc b/sky/viewer/document_view.cc
index bd360b7690e348a2f5c292f5bb910f3fc7e8675a..510c8d4bd8b603f594de657734b09f919a32940f 100644
--- a/sky/viewer/document_view.cc
+++ b/sky/viewer/document_view.cc
@@ -198,11 +198,11 @@ mojo::ScopedMessagePipeHandle DocumentView::TakeServicesProvidedToEmbedder() {
 }
 
 mojo::ScopedMessagePipeHandle DocumentView::TakeServicesProvidedByEmbedder() {
-  return services_provided_by_embedder_.PassMessagePipe();
+  return services_provided_by_embedder_.PassInterface().PassHandle();
 }
 
 mojo::ScopedMessagePipeHandle DocumentView::TakeServiceRegistry() {
-  return service_registry_.PassMessagePipe();
+  return service_registry_.PassInterface().PassHandle();
 }
 
 mojo::Shell* DocumentView::GetShell() {