[jumbo] fixup after recent headless network service work

Followup to https://chromium-review.googlesource.com/c/chromium/src/+/1263566
which introduced a namespace clash between ::network and ::headless::network.

Also, rename one of two kProductName's.

TBR=caseq@chromium.org

Bug: 838291,792676
Change-Id: Ie1fc9ab2096a09651ba2dd45aa262ab30bfd3efc
Reviewed-on: https://chromium-review.googlesource.com/c/1277992
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Reviewed-by: Daniel Bratell <bratell@opera.com>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599150}
2 files changed