gcapi/mac: Prevent "unknown binary" stderr output from sudo

gcapi/mac: Prevent "unknown binary" stderr output from sudo

BUG=151345
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=151365

[Nico, 2012-08-13 21:22:27]

The code seems to mostly work as is. The only issue I found was that sudo
complains that ksadmin doesn't exist. This CL checks if the binary exists (it's
not ideal: It might be there but not executable); alternatively I could connect
the NSTask's stderr to a pipe.

[Mark Mentovai, 2012-08-13 21:57:16]

I like this better than setting up a pipe for stderr, because if there are other
errors, you’d probably want them to just get spewed out to stderr.

LGTM

[Nico, 2012-08-13 21:59:23]

On Mon, Aug 13, 2012 at 2:57 PM,  <mark@chromium.org> wrote:
> I like this better than setting up a pipe for stderr, because if there are
> other errors, you’d probably want them to just get spewed out to stderr.
>
> LGTM

Right, that was my reasoning too. Thanks!