Index: content/common/presentation/presentation_service.mojom |
diff --git a/content/common/presentation/presentation_service.mojom b/content/common/presentation/presentation_service.mojom |
index 1ec3d7cddfbfeaffac102cad6403d513daeec294..79d1d2071854bf2e8aad3b44c3e0ec34c985d11b 100644 |
--- a/content/common/presentation/presentation_service.mojom |
+++ b/content/common/presentation/presentation_service.mojom |
@@ -98,6 +98,8 @@ interface PresentationService { |
PresentationSessionState newState); |
// Called when the frame is ready to process the next batch of messages. |
+ // When the callback carries null messages, there is an error |
+ // at the presentation service side. |
ListenForSessionMessages() |
- => (array<SessionMessage> messages); |
+ => (array<SessionMessage>? messages); |
}; |