GitLab

This CL introduces an ad-hoc builder for roll of opus into chromium.
  1/ Used as pres-submit validation.
  2/ Runs dedicated tests and benchmarks for a fixed Android model.

The point 2/ shall be completed in follow-up CLs.

Bug: chromium:1002973
Change-Id: Idb5c8b46ab68d8a9d63a864594396ac021a22746
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1816555
Commit-Queue: Yves Gerey <yvesg@google.com>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704847}