tree ab36647dfd46f3dceb5abaa7503bee30a9db5107
parent 700fc8483bc0222ce59b657a45923cae9da6d177
author Danil Chapovalov <danilchap@webrtc.org> 1526889456 +0200
committer Commit Bot <commit-bot@chromium.org> 1527666690 +0000

Use absl::optional instead or rtc::Optional

BUG: webrtc:9078
Change-Id: I69aedce324d86e8894b81210a2de17c5ef68fd11
Reviewed-on: https://webrtc-review.googlesource.com/77082
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23440}