Revert of Disable WebGL conformance test on Win8/NVIDIA

Revert of Disable WebGL conformance test on Win8/NVIDIA (patchset #3 id:40001 of https://codereview.chromium.org/930423002/)

Reason for revert:
kbr@ doesn't think this is needed anymore, and it might be a cause of us missing real issues.  I'll try reverting it, and keep an eye on it.

Original issue's description:
> Disable WebGL conformance test on Win8/NVIDIA
>
> The test:
> conformance_textures_tex_image_and_sub_image_2d_with_array_buffer_view
>
> Has been timing out on and off for as long as we have records.
>
> BUG=459265
> NOPRESUBMIT=True
>
> Committed: https://crrev.com/777a126ec7c9fbd50c4f62b27de648e5b306fc7d
> Cr-Commit-Position: refs/heads/master@{#316872}

TBR=zmo@chromium.org,ccameron@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=459265
Committed: https://crrev.com/997ea6c612de165623240c058f9e4e89ced7f702
Cr-Commit-Position: refs/heads/master@{#325142}

[hendrikw, 2015-04-14 22:22:10]

Created Revert of Disable WebGL conformance test on Win8/NVIDIA

[hendrikw, 2015-04-14 22:35:49]

The CQ bit was checked by hendrikw@chromium.org

[commit-bot: I haz the power, 2015-04-14 22:36:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1085073002/1

[commit-bot: I haz the power, 2015-04-14 22:37:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-14 22:38:26]

Patchset 1 (id:??) landed as
https://crrev.com/997ea6c612de165623240c058f9e4e89ced7f702
Cr-Commit-Position: refs/heads/master@{#325142}

[johnme, 2015-04-16 13:47:22]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1082203004/ by johnme@chromium.org.

The reason for reverting is: Still very flaky on Win Nvidia:

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=....

[hendrikw, 2015-04-16 15:17:46]

On 2015/04/16 13:47:22, johnme wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1082203004/ by mailto:johnme@chromium.org.
> 
> The reason for reverting is: Still very flaky on Win Nvidia:
> 
>
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=....

I'm not sure why you reverted this.  Only win8 is disabled by this test, and
it's not that flaky.  win7, however is flaky, and there are other changes going
in that should resolve that.

[hendrikw, 2015-04-16 15:20:05]

On 2015/04/16 15:17:46, hendrikw wrote:
> On 2015/04/16 13:47:22, johnme wrote:
> > A revert of this CL (patchset #1 id:1) has been created in
> > https://codereview.chromium.org/1082203004/ by mailto:johnme@chromium.org.
> > 
> > The reason for reverting is: Still very flaky on Win Nvidia:
> > 
> >
>
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=....
> 
> I'm not sure why you reverted this.  Only win8 is disabled by this test, and
> it's not that flaky.  win7, however is flaky, and there are other changes
going
> in that should resolve that.

I see, it is all win (comment said win 8).  I guess I'll revert this revert
after the webgl change rolls in.