tree 4b38996c3eaed36ace6fcf15b3a5d44a73ae4631
parent 32eff228855cfc27da39e58c4a557b397f9d5420
author Sami Kyostila <skyostil@google.com> 1578401815 +0000
committer Sami Kyostila <skyostil@google.com> 1578401815 +0000

TrackEvent: Add parent uuid field and move track descriptor extension points

This patch adds the parent_uuid field to the track descriptor so that
tracks can be grouped in a hierarchy and moves the extension points
(e.g., Chrome-specific track descriptor fields) to their own top-level
messages to make it easier to add custom descriptor extensions in the
future.

Bug: 132678367
Change-Id: I448df34a7acff5809cd768b25f3d22d2ac27cf73