The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/055484e20ec54cb4066f531fb2ff234caa814caa

commit 055484e20ec54cb4066f531fb2ff234caa814caa
Author: Colin Blundell <blundell@chromium.org>
Date: Fri Jun 16 06:54:17 2017

Bring up services_unittests on iOS

As a first step to integrating services on iOS, this CL brings up an
abbreviated version of services_unittests on iOS. In particular, we
bring up the Identity Service unittests; we choose the Identity Service
as an initial candidate as (a) we know we'll need it on iOS and (b) the
author of this CL is also the owner of the Identity Service :).

Most of the work is in simply eliding concerns that are not relevant
on iOS, namely, infrastructure for running in multiprocess mode that
is not present on iOS. Note that services will likely never run
multiprocess on iOS due to usual restrictions on iOS apps. Similarly,
the "service" GN template does not work out of the box on iOS, and it
does not seem like standalone service binaries make sense on iOS. For
this reason, some surgery on GN files has to be done to ensure that no
"service" targets are visible on iOS. By design, the bots build with
no targets specified, resulting in the building of every target that
is visible, meaning that it isn't sufficient to ensure that these
targets aren't referenced in the dependency tree :(.

Tested locally as follows:

$ ninja -C out/Debug-iphonesimulator/ services_unittests
$ ./out/Debug-iphonesimulator/iossim ./out/Debug-iphonesimulator/services_unittests.app/
...
[==========] Running 2 tests from 1 test case.
...
[----------] 2 tests from IdentityManagerTest
...
[  PASSED  ] 2 tests.

TBR=jam

Bug:  731587 ,  731581 
Change-Id: I69090f69460f455e79232734d419e7731f01129f
Reviewed-on: https://chromium-review.googlesource.com/532958
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Ken Rockot <rockot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#479973}
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[modify] https://crrev.com/055484e20ec54cb4066f531fb2ff234caa814caa/services/service_manager/runner/host/service_process_launcher_unittest.cc
[modify] https://crrev.com/055484e20ec54cb4066f531fb2ff234caa814caa/services/service_manager/service_manager.cc
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