Recognize the --net-log-capture-mode switch in Network Service.

Bug: 962523
Change-Id: I7f1d20a2864470b0addb8064f6e553ea3d95435c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614697
Commit-Queue: Eric Roman <eroman@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661101}
13 files changed