[8/4/16] webperf group call @ 11AM PST

Dial-in details:
https://www.w3.org/wiki/Web_Performance/Call_Information#VoIP

Tentative agenda:

   - Long Task notifications via Performance Observer
      -
      https://discourse.wicg.io/t/proposal-long-task-notifications-in-performance-observer/1613
      - [sendbeacon] switch to whitelist for corsMode:
   https://github.com/w3c/beacon/pull/34
   - [hr-time] timeOrigin... again :)
      - https://github.com/w3c/hr-time/pull/29#issuecomment-235359979
   - [resource-timing] run through L2 issues...
      - https://github.com/w3c/resource-timing/milestone/2