Revert of Suppress data races in SkEventTracer

Revert of Suppress data races in SkEventTracer (patchset #1 id:1 of https://codereview.chromium.org/1081863003/)

Reason for revert:
I think this is fixed.

Original issue's description:
> Suppress data races in SkEventTracer
>
> BUG=437044
> TBR=mtklein@chromium.org
>
> Committed: https://crrev.com/f0a9e71e6ad0b13397d45afeeeba7c0ced15b570
> Cr-Commit-Position: refs/heads/master@{#326024}

TBR=mtklein@chromium.org,glider@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=437044
Committed: https://crrev.com/bc743cc147868ef8a21db6e2d8bb4c6386b96689
Cr-Commit-Position: refs/heads/master@{#327102}

[mtklein, 2015-04-27 17:49:47]

Created Revert of Suppress data races in SkEventTracer

[mtklein, 2015-04-27 17:50:11]

The CQ bit was checked by mtklein@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-04-27 17:51:08]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1111433002/1

[commit-bot: I haz the power, 2015-04-27 17:52:36]

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

[commit-bot: I haz the power, 2015-04-27 17:52:37]

Dry run: This issue passed the CQ dry run.

[Alexander Potapenko, 2015-04-27 18:02:33]

lgtm

[mtklein, 2015-04-27 19:29:00]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2015-04-27 19:29:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1111433002/1

[commit-bot: I haz the power, 2015-04-27 19:30:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-27 19:31:45]

Patchset 1 (id:??) landed as
https://crrev.com/bc743cc147868ef8a21db6e2d8bb4c6386b96689
Cr-Commit-Position: refs/heads/master@{#327102}