Revert of The name attribute can be from contents for listitem role

Revert of The name attribute can be from contents for listitem role (patchset #1 id:1 of https://codereview.chromium.org/696953002/)

Reason for revert:
This seems breaking AccessibilityAriaList in content_browsertests on Mac.
http://build.chromium.org/p/chromium.webkit/builders/Mac10.6%20Tests/builds/27219
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#master=chromium.webkit&testType=content_browsertests&tests=DumpAccessibilityTreeTest.AccessibilityAriaList


Original issue's description:
> The name attribute can be from contents for listitem role
> according to http://www.w3.org/WAI/PF/aria/roles#listitem.
> 
> BUG=347865
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184795

TBR=dmazzoni@chromium.org,je_julie.kim@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=347865
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184802

[Hajime Morrita, 2014-11-03 21:52:34]

Created Revert of The name attribute can be from contents for listitem role

[commit-bot: I haz the power, 2014-11-03 21:53:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/703473002/1

[commit-bot: I haz the power, 2014-11-03 21:53:55]

Committed patchset #1 (id:1) as 184802

[je_julie(Not used), 2014-11-04 02:51:05]

Hi Morrita,
Thanks for handling it.