Revert of Suppress memory leak from WebGraphicsContext3DCommandBufferImpl

Revert of Suppress memory leak from WebGraphicsContext3DCommandBufferImpl (patchset #1 id:20001 of https://codereview.chromium.org/1428643002/ )

Reason for revert:
for speculative revert

Original issue's description:
> Suppress memory leak from WebGraphicsContext3DCommandBufferImpl
>
> BUG=548039
> TBR=erikchen@chromium.org,reveman@chromium.org
>
> Committed: https://crrev.com/fb1a837f472bc9f004ccb8fa1c0d5f83acbeba4e
> Cr-Commit-Position: refs/heads/master@{#356444}

TBR=erikchen@chromium.org,reveman@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=548039
Committed: https://crrev.com/eca678585491d769a57eb41b34cb0b79a8e050f0
Cr-Commit-Position: refs/heads/master@{#356524}

[oshima, 2015-10-28 07:41:51]

Created Revert of Suppress memory leak from
WebGraphicsContext3DCommandBufferImpl

[commit-bot: I haz the power, 2015-10-28 07:42:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1411643004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1411643004/1

[commit-bot: I haz the power, 2015-10-28 07:42:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-28 07:43:29]

Patchset 1 (id:??) landed as
https://crrev.com/eca678585491d769a57eb41b34cb0b79a8e050f0
Cr-Commit-Position: refs/heads/master@{#356524}

[oshima, 2015-10-28 07:47:44]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1427733002/ by oshima@chromium.org.

The reason for reverting is: Couldn't do speculative revert due to conflict.
I'll look into other CLs first..