GitLab

Change VariationsServiceStartsRequestOnNetworkChange to unit test
instead of browser test. Using the mock variations service to perform
the same test.

Bug: 905714
Change-Id: I66c4b6c91ec94933c19218398af9057f736ad736
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1550189Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Auto-Submit: Weilun Shi <sweilun@chromium.org>
Cr-Commit-Position: refs/heads/master@{#648705}