Improve accessible markup of OOBE network drop-down.

Improve accessible markup of OOBE network drop-down.

BUG=161880
TBR=nkostylev

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=170977

[commit-bot: I haz the power, 2012-12-03 21:57:24]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[commit-bot: I haz the power, 2012-12-03 22:02:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dmazzoni@chromium.org/11428124/1

[commit-bot: I haz the power, 2012-12-04 02:04:51]

Retried try job too often on win_rel for step(s) chrome_frame_net_tests,
chrome_frame_unittests, content_browsertests, installer_util_unittests,
mini_installer_test, nacl_integration, sync_integration_tests

[dmazzoni, 2012-12-04 08:56:10]

On Fri, Nov 30, 2012 at 5:16 PM, David Tseng <dtseng@chromium.org> wrote:

> +      this.title_.setAttribute('aria-owns', container.id);
>
> Any chance we could simply set this.title_'s aria-label to the name of the
> actual network selected (i.e. this.selectedItem)?
>

Actually the title already has the name of the actual network selected as
its inner text. The problem is that when you close the pop-up, this doesn't
change, so ChromeVox doesn't announce anything.

Is this change okay as-is?

- Dominic

[Nikita (slow), 2012-12-04 16:46:02]

lgtm