Adding PreRole in blink side to expose HTML pre tag with correct MSAA+IA2.

Adding PreRole in blink side to expose HTML pre tag with correct MSAA+IA2.

This is blink side CL to expose HTML pre tag in chromium side with proper MSAA+IA2 role.

BUG=426053
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184300

[shreeramk, 2014-10-22 19:09:04]

shreeram.k@samsung.com changed reviewers:
+ aboxhall@chromium.org, dmazzoni@chromium.org

[shreeramk, 2014-10-22 19:09:05]

Please review.

Thanks!

[dmazzoni, 2014-10-23 16:13:16]

The CQ bit was checked by dmazzoni@chromium.org

[dmazzoni, 2014-10-23 16:13:16]

lgtm

[commit-bot: I haz the power, 2014-10-23 16:13:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/671003002/1

[commit-bot: I haz the power, 2014-10-23 18:16:00]

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

[commit-bot: I haz the power, 2014-10-23 18:16:03]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/33321)

[shreeramk, 2014-10-23 18:29:17]

The CQ bit was checked by shreeram.k@samsung.com

[commit-bot: I haz the power, 2014-10-23 18:29:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/671003002/1

[commit-bot: I haz the power, 2014-10-23 20:14:02]

Committed patchset #1 (id:1) as 184300

[leviw_travelin_and_unemployed, 2014-10-23 23:30:10]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/675033002/ by leviw@chromium.org.

The reason for reverting is: Broke the browser tests crbug.com/426608.