Revert of Remove javaEnabled setting.

Revert of Remove javaEnabled setting. (patchset #1 id:1 of https://codereview.chromium.org/1306403003/ )

Reason for revert:
Reverting to see whether this fixes the compilation.

Original issue's description:
> Remove javaEnabled setting.
> 
> As of M45, NPAPI support is (almost) completely gone, so Java will never
> be supported anyway.
> 
> BUG=none
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201211

TBR=haraken@chromium.org,dcheng@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201217

[battre, 2015-08-26 08:43:26]

Created Revert of Remove javaEnabled setting.

[commit-bot: I haz the power, 2015-08-26 08:43:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1318703002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1318703002/1

[commit-bot: I haz the power, 2015-08-26 08:44:05]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201217

[haraken, 2015-08-26 08:45:19]

LGTM

[battre, 2015-08-26 09:10:42]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1319673003/ by battre@chromium.org.

The reason for reverting is: Relanding because this had no impact. The bug
disappeared and re-appeared regardless of this CL..