[Autofill] Clicking datalist chooser arrow now shows Autofill/Autocomplete

[Autofill] Clicking datalist chooser arrow now shows Autofill/Autocomplete

Previous implementation had a flash where we would see datalist only, then the full list with Autofill (see bug for description). Behavior now is to show the full list of suggestions that we have (datalist + Autofill/autocomplete, if available).

BUG=558530
TEST=manual

Committed: https://crrev.com/5f90bce226b6d480466091cd2940768619b16fd3
Cr-Commit-Position: refs/heads/master@{#361044}

[Mathieu, 2015-11-19 19:48:51]

Patchset #1 (id:1) has been deleted

[Mathieu, 2015-11-19 19:49:34]

Hi Evan, 

PTAL.

[Mathieu, 2015-11-19 20:09:23]

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

[Mathieu, 2015-11-19 20:09:24]

Hi Evan, PTAL.

[Evan Stade, 2015-11-20 21:28:13]

lgtm

[Mathieu, 2015-11-20 22:12:34]

The CQ bit was checked by mathp@chromium.org

[commit-bot: I haz the power, 2015-11-20 22:15:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1447283006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1447283006/20001

[commit-bot: I haz the power, 2015-11-20 23:21:36]

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

[commit-bot: I haz the power, 2015-11-20 23:21:36]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[Mathieu, 2015-11-22 13:30:47]

The CQ bit was checked by mathp@chromium.org

[commit-bot: I haz the power, 2015-11-22 13:30:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1447283006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1447283006/20001

[commit-bot: I haz the power, 2015-11-22 20:17:11]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-11-22 20:30:06]

Patchset 1 (id:??) landed as
https://crrev.com/5f90bce226b6d480466091cd2940768619b16fd3
Cr-Commit-Position: refs/heads/master@{#361044}