Disable memory.top_7_stress on Mac 10.10

Disable memory.top_7_stress on Mac 10.10

BUG=517806
TBR=sullivan
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect;tryserver.chromium.perf:mac_perf_bisect;tryserver.chromium.perf:win_perf_bisect

Committed: https://crrev.com/30eff07169c65fdbaee5291e50b887806fd8b706
Cr-Commit-Position: refs/heads/master@{#342352}

[magjed_chromium, 2015-08-07 09:58:17]

magjed@chromium.org changed reviewers:
+ sullivan@chromium.org

[magjed_chromium, 2015-08-07 10:00:39]

The CQ bit was checked by magjed@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-08-07 10:00:46]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1271203004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1271203004/1

[commit-bot: I haz the power, 2015-08-07 12:01:08]

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

[commit-bot: I haz the power, 2015-08-07 12:01:09]

Dry run: Try jobs failed on following builders:
  android_nexus5_perf_bisect on tryserver.chromium.perf (JOB_TIMED_OUT, no build
URL)

[magjed_chromium, 2015-08-07 12:09:07]

The CQ bit was checked by magjed@chromium.org

[commit-bot: I haz the power, 2015-08-07 12:09:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1271203004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1271203004/1

[magjed_chromium, 2015-08-07 13:54:06]

The CQ bit was unchecked by magjed@chromium.org

[magjed_chromium, 2015-08-07 14:07:35]

The CQ bit was checked by magjed@chromium.org

[commit-bot: I haz the power, 2015-08-07 14:07:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1271203004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1271203004/1

[commit-bot: I haz the power, 2015-08-07 14:12:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-07 14:12:49]

Patchset 1 (id:??) landed as
https://crrev.com/30eff07169c65fdbaee5291e50b887806fd8b706
Cr-Commit-Position: refs/heads/master@{#342352}