| Index: Source/modules/serviceworkers/CacheStorage.idl
 | 
| diff --git a/Source/modules/serviceworkers/CacheStorage.idl b/Source/modules/serviceworkers/CacheStorage.idl
 | 
| index 50c4c5f1a9a7b872df506774c0d668786ffd9d62..0ebff1e89631dc321e59b176306826e0a5d77454 100644
 | 
| --- a/Source/modules/serviceworkers/CacheStorage.idl
 | 
| +++ b/Source/modules/serviceworkers/CacheStorage.idl
 | 
| @@ -7,6 +7,7 @@
 | 
|      GarbageCollected,
 | 
|      Exposed=ServiceWorker,
 | 
|      RuntimeEnabled=ServiceWorkerCache,
 | 
| +    TypeChecking=Interface,
 | 
|  ] interface CacheStorage {
 | 
|    [CallWith=ScriptState] Promise has(ScalarValueString cacheName);
 | 
|    [CallWith=ScriptState] Promise open(ScalarValueString cacheName);
 | 
| 
 |