GitLab

This patch added content-capture trace event category, also traced
scheduling task and task running event.

Bug: 1006418
Change-Id: I2dbe38bbf3e09645abb6185e8efa15587ffb00ec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1817282Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Tao Bai <michaelbai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699899}