Changes places where we explicitly construct an Optional to instead use
nullopt or the requisite value type only.
This CL was uploaded by git cl split.
R=henrikg@webrtc.org
Bug: None
Change-Id: I8cb71d015813312ccfc1b6fc7a2a27f391aaf4d1
Reviewed-on: https://webrtc-review.googlesource.com/23614
Reviewed-by: Henrik Grunell <henrikg@webrtc.org>
Commit-Queue: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20876}
606c882972