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=pthatcher@webrtc.org
Bug: None
Change-Id: Icdc7e9e4395eeac053483c69e53501e5aa222107
Reviewed-on: https://webrtc-review.googlesource.com/23567
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Peter Thatcher <pthatcher@webrtc.org>
Commit-Queue: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20867}
0e1d7989a5