CloseMultipleNowOrOnExec(): promote out of test

CloseMultipleNowOrOnExec(): promote out of test.

This function will be useful in upcoming non-test code. Because the
first Crashpad client that wants a Crashpad handler will now be
responsible for starting the handler process, this will prevent file
descriptors from leaking to the handler process.

R=rsesek@chromium.org

Committed: https://chromium.googlesource.com/crashpad/crashpad/+/110eafe9a17acb9e4a6419aec1d139075edf0c16

[Mark Mentovai, 2014-12-18 20:46:06]

mark@chromium.org changed reviewers:
+ rsesek@chromium.org

[Mark Mentovai, 2014-12-18 20:46:06]

For reference, the handler-starter I’m working on is in
https://codereview.chromium.org/798743003/, along with the crashpad_handler
process and a run_with_crashpad tool that lets you start a Crashpad handler and
run any program, redirecting its crashes to the handler. That’ll probably be
split into three more changes or so.

[Robert Sesek, 2014-12-19 19:25:39]

LGTM

[Mark Mentovai, 2014-12-19 21:42:38]

Committed patchset #2 (id:20001) manually as
110eafe9a17acb9e4a6419aec1d139075edf0c16 (presubmit successful).