Add ServiceManagement*() and their tests

Add ServiceManagement*() and their tests.

TEST=util_test ServiceManagement
R=rsesek@chromium.org

Committed: https://chromium.googlesource.com/crashpad/crashpad/+/a70edb3b7f55

[Mark Mentovai, 2014-08-12 23:42:39]

This depends on https://codereview.chromium.org/461253002/.

[Robert Sesek, 2014-08-14 20:27:22]

https://codereview.chromium.org/467923003/diff/1/util/mac/service_management.h
File util/mac/service_management.h (right):

https://codereview.chromium.org/467923003/diff/1/util/mac/service_management....
util/mac/service_management.h:42: //! \return `true` if the job was removed
successfully, otherwise `false`.
What does this return if the job is removed asynchronously?

https://codereview.chromium.org/467923003/diff/1/util/mac/service_management....
util/mac/service_management.h:60: //!     exist prior to Mac OS X 10.6, and on
Mac OS X 10.10 DP2 14a261i, it
What about in DP5?

https://codereview.chromium.org/467923003/diff/1/util/mac/service_management_...
File util/mac/service_management_test.mm (right):

https://codereview.chromium.org/467923003/diff/1/util/mac/service_management_...
util/mac/service_management_test.mm:141:
EXPECT_FALSE(ServiceManagementIsJobLoaded(kJobLabel));
Maybe ASSERT this instead.

[Mark Mentovai, 2014-08-14 22:51:59]

Feedback addressed.

I retested on 10.10 DP5 14A314h and found that it was the same as DP2, so I
updated the comments to reflect DP5, which is current.

[Robert Sesek, 2014-08-15 21:33:12]

LGTM

[Mark Mentovai, 2014-08-16 05:30:27]

Committed patchset #5 manually as a70edb3b7f55 (presubmit successful).