| Index: Source/platform/RuntimeEnabledFeatures.in | 
| diff --git a/Source/platform/RuntimeEnabledFeatures.in b/Source/platform/RuntimeEnabledFeatures.in | 
| index 06dede73d19ddf388fefb8758bd4fdb79437280e..fe593bf60d61b9917aeeddcf70f28d08db4e3497 100644 | 
| --- a/Source/platform/RuntimeEnabledFeatures.in | 
| +++ b/Source/platform/RuntimeEnabledFeatures.in | 
| @@ -114,6 +114,7 @@ PrefixedEncryptedMedia status=stable | 
| // See https://crbug.com/346236 for current status. | 
| PrefixedVideoFullscreen status=stable | 
| Presentation status=test | 
| +PromiseRejectionEvent status=experimental | 
| PushMessaging status=stable | 
| // Push messaging payloads are blocked on the Push API supporting encryption. | 
| PushMessagingData status=test | 
|  |