[Attempt 2] Inform Chrome client of changes to an input's datalist.

[Attempt 2] Inform Chrome client of changes to an input's datalist.

This causes Chrome to update any already-visible datalist dropdowns when options are added or removed.

Chromium side: https://codereview.chromium.org/798073003/

BUG=428790
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=187117

[Evan Stade, 2014-12-13 02:31:51]

estade@chromium.org changed reviewers:
+ tkent@chromium.org

[tkent, 2014-12-15 02:12:52]

The CQ bit was checked by tkent@chromium.org

[tkent, 2014-12-15 02:12:53]

lgtm

[commit-bot: I haz the power, 2014-12-15 02:13:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/799893004/1

[commit-bot: I haz the power, 2014-12-15 04:05:26]

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

[commit-bot: I haz the power, 2014-12-15 04:05:27]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/41665)

[tkent, 2014-12-15 04:10:56]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2014-12-15 04:11:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/799893004/1

[commit-bot: I haz the power, 2014-12-15 06:10:45]

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

[commit-bot: I haz the power, 2014-12-15 06:10:46]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/41694)

[tkent, 2014-12-15 06:13:06]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2014-12-15 06:13:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/799893004/1

[commit-bot: I haz the power, 2014-12-15 07:09:50]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=187117