GitLab

Added chiniforooshan@ who has contributed to tracing for a long time and is as familiar with the codebase as anyone.

Moved some inactive owners to emeritus.

R=primiano@chromium.org
CC=chiniforooshan@chromium.org

Change-Id: I2d2ae64677b7d33228101ceaa10f5b23eceba0a9
Reviewed-on: https://chromium-review.googlesource.com/1033324Reviewed-by: Primiano Tucci <primiano@chromium.org>
Commit-Queue: Primiano Tucci <primiano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554799}