Assigning to Colin as preliminary owner

actually looks like they all pass so there's no work to do :)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d2186151e382667079820e309fe729f54b7e2bc6

commit d2186151e382667079820e309fe729f54b7e2bc6
Author: John Abd-El-Malek <jam@chromium.org>
Date: Tue Mar 06 23:09:53 2018

Run components_browsertests with network service along with the other network_service gtests.

Bug:  819246 
Change-Id: Ie99c44c871d6f3a747abb3555c96310deb164d2f
Reviewed-on: https://chromium-review.googlesource.com/951890
Reviewed-by: Ken Rockot <rockot@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541229}
[modify] https://crrev.com/d2186151e382667079820e309fe729f54b7e2bc6/testing/buildbot/chromium.fyi.json
[modify] https://crrev.com/d2186151e382667079820e309fe729f54b7e2bc6/testing/buildbot/chromium.linux.json
[modify] https://crrev.com/d2186151e382667079820e309fe729f54b7e2bc6/testing/buildbot/test_suites.pyl