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=tommi@webrtc.org
Bug: None
Change-Id: I0ca1b624859a6561e227480b7dac8c254d26ad57
Reviewed-on: https://webrtc-review.googlesource.com/23562
Reviewed-by: Tommi <tommi@webrtc.org>
Commit-Queue: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20916}
248ccf8ad4