GitLab

The test was failing because passing a null ("end of candidates")
candidate to addIceCandidate is not permitted.

Spec link:

https://www.w3.org/TR/webrtc/#dom-rtcpeerconnection-addicecandidate
https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-addicecandidate

Bug: none
Change-Id: I1f22d27393a482a882ebe9735488d8cb723b6e75
Reviewed-on: https://chromium-review.googlesource.com/918662Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Harald Alvestrand <hta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536977}