[FileAPI] Clean up use of WebIDL for Exposed=(Window, Worker) (#21)

Replace Exposed=Window,Worker with Exposed=(Window,Worker)

https://www.w3.org/Bugs/Public/show_bug.cgi?id=27705

---
Reply to this email directly or view it on GitHub:
https://github.com/w3c/FileAPI/issues/21

Received on Monday, 19 October 2015 16:26:16 UTC