Remove kNetworkService usage in services/network.

Bug: 934009
Change-Id: Ia6035a0bdcc0c9702d5758715ee27aec7ec7ce3e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1737671
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Auto-Submit: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684362}
9 files changed