Revert 191506 "Revert 191098 "Enable HTMLPopupMenu in stable""

Revert 191506 "Revert 191098 "Enable HTMLPopupMenu in stable""

Reason: All known major bugs were fixed.  We'd like to try again.

> Revert 191098 "Enable HTMLPopupMenu in stable"
>
> Reason: Caused crashes
>
> > Enable HTMLPopupMenu in stable
> >
> > BUG=346582
> >
> > Review URL: https://codereview.chromium.org/961673005
>
> TBR=keishi@chromium.org
>
> Review URL: https://codereview.chromium.org/983373002

TBR=keishi@chromium.org
BUG=346582
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=192407

[tkent, 2015-03-24 00:06:42]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2015-03-24 00:07:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1005873006/1

[commit-bot: I haz the power, 2015-03-24 03:08:28]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=192407

[tkent, 2015-03-25 22:40:04]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1034863002/ by tkent@chromium.org.

The reason for reverting is: crbug.com/470459, crbug.com/470464,
crbug.com/470503, crbug.com/470504, crbug.com/470505.