Refactor ChromeOsMirrorAccountConsistencyTest to not use net/ directly.

This is necessary to get the test working with the network service
enabled.

Bug: 914406
Change-Id: I12cf941dfcdd6e7264a51c50e94bd026af45447e
Reviewed-on: https://chromium-review.googlesource.com/c/1383591
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617936}
2 files changed