Index: Source/core/streams/ReadableStreamReader.idl |
diff --git a/Source/core/streams/ReadableStreamReader.idl b/Source/core/streams/ReadableStreamReader.idl |
index 2185d5bfd29c2ee0e17285c5d78959467915bdb2..3adde2b1fe805abc0aef8a92628d47ceaffca436 100644 |
--- a/Source/core/streams/ReadableStreamReader.idl |
+++ b/Source/core/streams/ReadableStreamReader.idl |
@@ -13,6 +13,6 @@ |
[CallWith=ScriptState] readonly attribute Promise<void> closed; |
[CallWith=ScriptState] Promise<any> read(); |
- [CallWith=ScriptState] Promise<void> cancel(any reason); |
+ [CallWith=ScriptState] Promise<void> cancel(optional any reason); |
[RaisesException] void releaseLock(); |
}; |