12ab00b4d8
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=kwiberg@webrtc.org Bug: None Change-Id: I055411a3e521964c81100869a197dd92f5608f1b Reviewed-on: https://webrtc-review.googlesource.com/23619 Commit-Queue: Oskar Sundbom <ossu@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Elad Alon <eladalon@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20728}