| Index: Source/core/workers/WorkerGlobalScope.idl | 
| diff --git a/Source/core/workers/WorkerGlobalScope.idl b/Source/core/workers/WorkerGlobalScope.idl | 
| index 7d631e36919b33bfb5bdc3064f986653aed54693..7c46856af85c3b905303dc919fd00f06047ad7ab 100644 | 
| --- a/Source/core/workers/WorkerGlobalScope.idl | 
| +++ b/Source/core/workers/WorkerGlobalScope.idl | 
| @@ -35,6 +35,8 @@ | 
| void close(); | 
| // TODO(philipj): onerror should be an OnErrorEventHandler. | 
| attribute EventHandler onerror; | 
| +    [RuntimeEnabled=PromiseRejectionEvent] attribute EventHandler onrejectionhandled; | 
| +    [RuntimeEnabled=PromiseRejectionEvent] attribute EventHandler onunhandledrejection; | 
| // attribute EventHandler onlanguagechange; | 
| // attribute EventHandler onoffline; | 
| // attribute EventHandler ononline; | 
|  |