Revert "Disable HiResTimerManagerTest.ToggleOnOff on DrMemory."

Revert "Disable HiResTimerManagerTest.ToggleOnOff on DrMemory."

This reverts commit aefdf2976f2a700392763a670fd581462adc3646.

There was a logic bug.

BUG=408911
TBR= bruening

Committed: https://crrev.com/003f9b2506660f6f60e3264d3d5c3c38650c7fd6
Cr-Commit-Position: refs/heads/master@{#294619}

[cpu_(ooo_6.6-7.5), 2014-09-11 20:38:53]

cpu@chromium.org changed reviewers:
+ bruening@google.com

[cpu_(ooo_6.6-7.5), 2014-09-11 20:38:53]

cpu@chromium.org changed reviewers:
+ bruening@google.com

[cpu_(ooo_6.6-7.5), 2014-09-11 20:45:16]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-09-11 20:58:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/567793002/1

[commit-bot: I haz the power, 2014-09-11 23:20:04]

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

[commit-bot: I haz the power, 2014-09-11 23:20:05]

Failed to commit the patch.

[cpu_(ooo_6.6-7.5), 2014-09-12 17:58:22]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-09-12 18:19:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/567793002/1

[commit-bot: I haz the power, 2014-09-12 18:42:02]

Committed patchset #1 (id:1) as ef0f5d54eee858730902184d06c2d67b9f3a5869

[commit-bot: I haz the power, 2014-09-12 18:42:11]

Patchset 1 (id:??) landed as
https://crrev.com/003f9b2506660f6f60e3264d3d5c3c38650c7fd6
Cr-Commit-Position: refs/heads/master@{#294619}