[scheduler] Add task type and queue type to tracing.

R=skyostil@chromium.org

Change-Id: Id0aea377558e876c8178e82eb3a170f678c415cc
Reviewed-on: https://chromium-review.googlesource.com/1140717
Commit-Queue: Alexander Timin <altimin@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576201}
2 files changed