GitLab

Sandboxing flag should be enabled through field trial config instead:
https://cs.chromium.org/chromium/src/testing/variations/fieldtrial_testing_config.json

Change-Id: Ic34d3b1b5b52275bbee644e2a763cc50fed127da
Reviewed-on: https://chromium-review.googlesource.com/1209546Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589163}