GitLab

This adds a config entry for the experimental group in the first stage
of the out-of-process Storage Service rollout.

Bug: 1057802
Change-Id: I2d638fd881d0b8a39d80202278cafdd56eccbfaa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2106756Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#750835}