Revert of Enable a11y audit for chrome://settings

Revert of Enable a11y audit for chrome://settings (patchset #2 id:20001 of https://codereview.chromium.org/646853004/)

Reason for revert:
http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20(dbg)(1)

started consistently failing OptionsWebUIExtendedTest.CloseOverlay in the build in which this CL landed. This touches WebUI, and is implicated in many of the stack traces.

Reverting to try to green the bot.

Original issue's description:
> Enable a11y audit for chrome://settings
>
> Enabled the tests and fixed failure. Failure was due to transition obscuring elements in the UI.
>
> BUG=311866
>
> Committed: https://crrev.com/34a84c6d1269332cc3ae2b8a50af489230c885de
> Cr-Commit-Position: refs/heads/master@{#301266}

TBR=dbeam@chromium.org,hcarmona@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=311866
Committed: https://crrev.com/88ce5f888bd8707ec61cf737e78b96a0675d696b
Cr-Commit-Position: refs/heads/master@{#301289}

[Avi (use Gerrit), 2014-10-25 18:19:42]

Created Revert of Enable a11y audit for chrome://settings

[commit-bot: I haz the power, 2014-10-25 18:20:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/678883002/1

[commit-bot: I haz the power, 2014-10-25 18:20:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-25 18:21:27]

Patchset 1 (id:??) landed as
https://crrev.com/88ce5f888bd8707ec61cf737e78b96a0675d696b
Cr-Commit-Position: refs/heads/master@{#301289}