Bug 1693523 [wpt PR 27675] - Update interfaces/content-index.idl, a=t…

…estonly

Automatic update from web-platform-tests
Update interfaces/content-index.idl (#27675)

Source: https://github.com/w3c/webref/blob/4531bf6/ed/idl/content-index.idl
Build: https://travis-ci.org/w3c/webref/builds/217493628
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wpt-commits: 2a0d77c018b88bc10e61d4346ccf109ec6127474
wpt-pr: 27675

testing/web-platform/tests/interfaces/content-index.idl

@@ -39,7 +39,8 @@ dictionary ContentIndexEventInit : ExtendableEventInit {
   required DOMString id;
 };
 
-[Constructor(DOMString type, ContentIndexEventInit init), Exposed=ServiceWorker]
+[Exposed=ServiceWorker]
 interface ContentIndexEvent : ExtendableEvent {
+  constructor(DOMString type, ContentIndexEventInit init);
   readonly attribute DOMString id;
 };