Only generate proto descriptors in non-Chromium builds am: 5a5cbd5f07 am: 5aa6728f41
Only generate proto descriptors in non-Chromium builds am: 5a5cbd5f07
am: 5aa6728f41

Change-Id: I7afb834df2450118c16ce9b148096469025761ea

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto