The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b0c2e45a54b221ca6112967332996ab200178c96

commit b0c2e45a54b221ca6112967332996ab200178c96
Author: Robert Kroeger <rjkroege@chromium.org>
Date: Wed Jun 21 18:44:18 2017

Add tracing to ozone_demo

Add console tracing back to ozone_demo.

BUG= 734756 

Change-Id: I488750923400d272fe2d2108057968d42ff4fbc0
Reviewed-on: https://chromium-review.googlesource.com/540436
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Reviewed-by: Simon Hatch <simonhatch@chromium.org>
Commit-Queue: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481257}
[modify] https://crrev.com/b0c2e45a54b221ca6112967332996ab200178c96/ui/ozone/demo/BUILD.gn
[modify] https://crrev.com/b0c2e45a54b221ca6112967332996ab200178c96/ui/ozone/demo/DEPS
[modify] https://crrev.com/b0c2e45a54b221ca6112967332996ab200178c96/ui/ozone/demo/ozone_demo.cc

To verify: run

./ozone_demo --trace-to-console

on a CrOS device from a console. Watch the pretty coloured spew.