Reason for revert:
Blocks reverting:
https://chromium-review.googlesource.com/c/562505
Original issue's description:
> iOS - Add iceRegatherIntervalRange.
>
> BUG=webrtc:7969
>
> Review-Url: https://codereview.webrtc.org/2976953002
> Cr-Commit-Position: refs/heads/master@{#18997}
> Committed: 5e0ed36d74
TBR=haysc@webrtc.org,steveanton@webrtc.org,tkchin@webrtc.org
NOTRY=TRUE
BUG=webrtc:7969
Review-Url: https://codereview.webrtc.org/2979993003
Cr-Commit-Position: refs/heads/master@{#19023}