Add OWNERS file in gpu/perftests

Add OWNERS file in gpu/perftests

BUG=

Committed: https://crrev.com/740ae59fad6975f8c0ea75727483d961095be063
Cr-Commit-Position: refs/heads/master@{#317966}

[piman, 2015-02-25 02:08:35]

piman@chromium.org changed reviewers:
+ reveman@chromium.org

[piman, 2015-02-25 02:08:35]

reveman: please review (tag you're it)
dcastagna: FYI. You should get in too when you're a committer.

[reveman, 2015-02-25 02:20:39]

lgtm

[piman, 2015-02-25 02:28:23]

The CQ bit was checked by piman@chromium.org

[commit-bot: I haz the power, 2015-02-25 02:28:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/952093002/1

[commit-bot: I haz the power, 2015-02-25 02:45:03]

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

[commit-bot: I haz the power, 2015-02-25 02:45:04]

Try jobs failed on following builders:
  win_chromium_compile_dbg_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)

[piman, 2015-02-25 02:46:08]

The CQ bit was checked by piman@chromium.org

[commit-bot: I haz the power, 2015-02-25 02:47:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/952093002/1

[commit-bot: I haz the power, 2015-02-25 03:21:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-25 03:21:55]

Patchset 1 (id:??) landed as
https://crrev.com/740ae59fad6975f8c0ea75727483d961095be063
Cr-Commit-Position: refs/heads/master@{#317966}