Revert of Temporarily excluding failing test on valgrind/drmemory bots

Revert of Temporarily excluding failing test on valgrind/drmemory bots (patchset #1 id:20001 of https://codereview.chromium.org/680183003/)

Reason for revert:
We fixed the GestureRecognizerTest.GestureEventSmallPinchEnabled unit test, and now we can put it back.

Original issue's description:
> Temporarily excluding failing test on valgrind/drmemory bots
>
> BUG=427729
> TBR=lanwei@chromium.org
>
> Committed: https://crrev.com/d68b16491c7ff220905b2c5d2702f68d5387ddd9
> Cr-Commit-Position: refs/heads/master@{#301494}

TBR=oshima@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=427729
Committed: https://crrev.com/9e89b603955e15b8f4ac101bcd5750a886506d4d
Cr-Commit-Position: refs/heads/master@{#303243}

[lanwei, 2014-11-07 15:52:48]

Created Revert of Temporarily excluding failing test on valgrind/drmemory bots

[commit-bot: I haz the power, 2014-11-07 15:52:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/684653008/1

[commit-bot: I haz the power, 2014-11-07 15:52:57]

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

[commit-bot: I haz the power, 2014-11-07 15:52:57]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[oshima, 2014-11-07 16:38:45]

lgtm

[lanwei, 2014-11-07 16:42:12]

The CQ bit was checked by lanwei@chromium.org

[commit-bot: I haz the power, 2014-11-07 16:42:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/684653008/1

[commit-bot: I haz the power, 2014-11-07 16:44:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-07 16:44:49]

Patchset 1 (id:??) landed as
https://crrev.com/9e89b603955e15b8f4ac101bcd5750a886506d4d
Cr-Commit-Position: refs/heads/master@{#303243}