Revert of Reenable WebGL Image Chromium.

Revert of Reenable WebGL Image Chromium. (patchset #1 id:1 of https://codereview.chromium.org/2085573002/ )

Reason for revert:
Causes WebGL2 conformance test errors on some devices.

https://bugs.chromium.org/p/chromium/issues/detail?id=620067

Original issue's description:
> [Reland 1] Reenable WebGL Image Chromium.
> 
> The feature was disabled because of two bugs. Both have since been fixed.
> 
> BUG=617249, 581777
> TBR=piman@chromium.org, kbr@chromium.org
> 
> Committed: https://crrev.com/f5c146230498ed8e7c5b24d2361c0551415e368d
> Cr-Commit-Position: refs/heads/master@{#400709}

TBR=kbr@chromium.org,piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=617249, 581777

[erikchen, 2016-06-20 20:56:40]

The CQ bit was checked by erikchen@chromium.org

[erikchen, 2016-06-20 20:56:40]

Created Revert of Reenable WebGL Image Chromium.

[commit-bot: I haz the power, 2016-06-20 20:57:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2078333004/1

[commit-bot: I haz the power, 2016-06-20 20:58:01]

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

[commit-bot: I haz the power, 2016-06-20 20:58:06]

Internal error: failed to checkout. Please try again.

[erikchen, 2016-06-20 21:50:55]

On 2016/06/20 20:58:06, commit-bot: I haz the power wrote:
> Internal error: failed to checkout. Please try again.

This CL had trouble landing. I wanted to disable the WebGL2 test anyways, so
instead I'm going to do that directly and close this CL.

[erikchen, 2016-06-20 21:51:19]

On 2016/06/20 21:50:55, erikchen wrote:
> On 2016/06/20 20:58:06, commit-bot: I haz the power wrote:
> > Internal error: failed to checkout. Please try again.
> 
> This CL had trouble landing. I wanted to disable the WebGL2 test anyways, so
> instead I'm going to do that directly and close this CL.

see https://codereview.chromium.org/2087463003/.

[erikchen, 2016-06-20 21:51:25]

Description was changed from

==========
Revert of Reenable WebGL Image Chromium. (patchset #1 id:1 of
https://codereview.chromium.org/2085573002/ )

Reason for revert:
Causes WebGL2 conformance test errors on some devices.

https://bugs.chromium.org/p/chromium/issues/detail?id=620067

Original issue's description:
> [Reland 1] Reenable WebGL Image Chromium.
> 
> The feature was disabled because of two bugs. Both have since been fixed.
> 
> BUG=617249, 581777
> TBR=piman@chromium.org, kbr@chromium.org
> 
> Committed: https://crrev.com/f5c146230498ed8e7c5b24d2361c0551415e368d
> Cr-Commit-Position: refs/heads/master@{#400709}

TBR=kbr@chromium.org,piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=617249, 581777
==========

to

==========
Revert of Reenable WebGL Image Chromium. (patchset #1 id:1 of
https://codereview.chromium.org/2085573002/ )

Reason for revert:
Causes WebGL2 conformance test errors on some devices.

https://bugs.chromium.org/p/chromium/issues/detail?id=620067

Original issue's description:
> [Reland 1] Reenable WebGL Image Chromium.
> 
> The feature was disabled because of two bugs. Both have since been fixed.
> 
> BUG=617249, 581777
> TBR=piman@chromium.org, kbr@chromium.org
> 
> Committed: https://crrev.com/f5c146230498ed8e7c5b24d2361c0551415e368d
> Cr-Commit-Position: refs/heads/master@{#400709}

TBR=kbr@chromium.org,piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=617249, 581777
==========