Move GN build file for gmock_mutant from build/secondary into the main tree.

Move GN build file for gmock_mutant from build/secondary into the main tree.

There is no need to keep it in the secondary tree.

BUG=None
TEST=gn gen out-gn/Debug
R=dpranke@chromium.org

Committed: https://crrev.com/16f0a88eea42d7528eaa71533e1c539c0bd45962
Cr-Commit-Position: refs/heads/master@{#329102}

[Dirk Pranke, 2015-05-08 23:06:38]

lgtm

[tfarina, 2015-05-09 13:35:35]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-05-09 13:36:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1123183004/1

[commit-bot: I haz the power, 2015-05-09 17:40:44]

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

[commit-bot: I haz the power, 2015-05-09 17:40:46]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_TIMED_OUT, no build URL)

[tfarina, 2015-05-10 00:51:10]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-05-10 00:52:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1123183004/1

[commit-bot: I haz the power, 2015-05-10 04:55:32]

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

[commit-bot: I haz the power, 2015-05-10 04:55:33]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_TIMED_OUT, no build URL)

[tfarina, 2015-05-11 01:14:54]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-05-11 01:15:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1123183004/1

[commit-bot: I haz the power, 2015-05-11 06:58:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-11 06:59:34]

Patchset 1 (id:??) landed as
https://crrev.com/16f0a88eea42d7528eaa71533e1c539c0bd45962
Cr-Commit-Position: refs/heads/master@{#329102}