Update Mac buildbot tester names.

Update Mac buildbot tester names.

This is a companion change to https://codereview.chromium.org/696353005/.

BUG=412374, 412376
R=smut@google.com, smut@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/13880c67798975cca6b3b03d322c54d410ddfe9f

[smut, 2014-11-04 21:27:32]

smut@google.com changed reviewers:
+ smut@google.com

[smut, 2014-11-04 21:27:33]

lgtm

[smut, 2014-11-04 21:27:37]

The CQ bit was checked by smut@google.com

[commit-bot: I haz the power, 2014-11-04 21:29:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/693183003/1

[commit-bot: I haz the power, 2014-11-04 21:29:36]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-11-04 21:29:37]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[commit-bot: I haz the power, 2014-11-04 21:29:53]

Patchset 1 (id:??) landed as
https://crrev.com/13880c67798975cca6b3b03d322c54d410ddfe9f
Cr-Commit-Position: refs/heads/master@{#302675}

[Robert Sesek, 2014-11-04 21:30:45]

Committed patchset #1 (id:1) manually as
13880c67798975cca6b3b03d322c54d410ddfe9f.