Revert of Disable some DumpAccessibilityTreeTest.Accessibility test on Windows

Revert of Disable some DumpAccessibilityTreeTest.Accessibility test on Windows (patchset #1 id:1 of https://codereview.chromium.org/2309273002/ )

Reason for revert:
Re-enabling these tests because the change that caused the try flakes was reverted here:

https://codereview.chromium.org/2302353005

Original issue's description:
> Disable some DumpAccessibilityTreeTest.Accessibility test on Windows
>
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> TBR=dmazzoni@chromium.org
> BUG=chromium:643954
>
> Committed: https://crrev.com/b7a4685cc72298483cde031c401007f78538d429
> Cr-Commit-Position: refs/heads/master@{#416527}

TBR=magjed@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:643954
Committed: https://crrev.com/87f9f625e8771d88f17a7146e01151417f5bf020
Cr-Commit-Position: refs/heads/master@{#417082}

[dmazzoni, 2016-09-07 19:32:46]

The CQ bit was checked by dmazzoni@chromium.org

[dmazzoni, 2016-09-07 19:32:46]

Created Revert of Disable some DumpAccessibilityTreeTest.Accessibility test on
Windows

[commit-bot: I haz the power, 2016-09-07 19:33:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-07 22:13:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-07 22:14:44]

Description was changed from

==========
Revert of Disable some DumpAccessibilityTreeTest.Accessibility test on Windows
(patchset #1 id:1 of https://codereview.chromium.org/2309273002/ )

Reason for revert:
Re-enabling these tests because the change that caused the try flakes was
reverted here:

https://codereview.chromium.org/2302353005



Original issue's description:
> Disable some DumpAccessibilityTreeTest.Accessibility test on Windows
> 
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> TBR=dmazzoni@chromium.org
> BUG=chromium:643954
> 
> Committed: https://crrev.com/b7a4685cc72298483cde031c401007f78538d429
> Cr-Commit-Position: refs/heads/master@{#416527}

TBR=magjed@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:643954
==========

to

==========
Revert of Disable some DumpAccessibilityTreeTest.Accessibility test on Windows
(patchset #1 id:1 of https://codereview.chromium.org/2309273002/ )

Reason for revert:
Re-enabling these tests because the change that caused the try flakes was
reverted here:

https://codereview.chromium.org/2302353005

Original issue's description:
> Disable some DumpAccessibilityTreeTest.Accessibility test on Windows
>
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> TBR=dmazzoni@chromium.org
> BUG=chromium:643954
>
> Committed: https://crrev.com/b7a4685cc72298483cde031c401007f78538d429
> Cr-Commit-Position: refs/heads/master@{#416527}

TBR=magjed@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:643954

Committed: https://crrev.com/87f9f625e8771d88f17a7146e01151417f5bf020
Cr-Commit-Position: refs/heads/master@{#417082}
==========

[commit-bot: I haz the power, 2016-09-07 22:14:45]

Patchset 1 (id:??) landed as
https://crrev.com/87f9f625e8771d88f17a7146e01151417f5bf020
Cr-Commit-Position: refs/heads/master@{#417082}