The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/100328a4719716df4235070b48978414a6007933

commit 100328a4719716df4235070b48978414a6007933
Author: Jay Civelli <jcivelli@google.com>
Date: Tue Nov 21 22:40:51 2017

Make elevated privileges sandbox defaults to correct type.

On non Windows platforms, the none_and_elevated sandbox type specified
in a service manifest would default to utility sandbox. It now
defaults to "no sandbox".
It used to be only used on Windows specific services so this was not an
issue, but an upcoming non-platform specific service will need it.

Bug:  787560 
Change-Id: Id2370735257a89f7588243be439c97c4769c7429
Reviewed-on: https://chromium-review.googlesource.com/782718
Reviewed-by: Ken Rockot <rockot@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Jay Civelli <jcivelli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518418}
[modify] https://crrev.com/100328a4719716df4235070b48978414a6007933/services/service_manager/sandbox/sandbox_type.cc
[modify] https://crrev.com/100328a4719716df4235070b48978414a6007933/services/service_manager/sandbox/switches.cc
[modify] https://crrev.com/100328a4719716df4235070b48978414a6007933/services/service_manager/sandbox/switches.h
[modify] https://crrev.com/100328a4719716df4235070b48978414a6007933/services/service_manager/tests/sandbox/sandbox_type_unittest.cc