Revert of Use experimental app list position whenever virtual keyboard is enabled.

Revert of Use experimental app list position whenever virtual keyboard is enabled. (https://codereview.chromium.org/253983002/)

Reason for revert:
Broke compilation on for CrOS[1] and Win64[2].

[1]: http://build.chromium.org/p/chromium.chromiumos/buildstatus?builder=Linux%20ChromiumOS%20Full&number=3373
[2]: http://build.chromium.org/p/chromium.win/buildstatus?builder=Win%20x64%20Builder&number=18192

Original issue's description:
> Use experimental app list position whenever virtual keyboard is enabled.
> 
> The old app list position doesn't fit on the screen when the keyboard is
> open. Therefore, whenever the virtual keyboard is enabled, use the new
> app list position (centered and wide).
> 
> BUG=369382
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=268443

TBR=varkha@chromium.org,benwells@chromium.org,mgiuca@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=369382
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=268446

[Mike West, 2014-05-06 06:57:39]

Created Revert of Use experimental app list position whenever virtual keyboard
is enabled.

[commit-bot: I haz the power, 2014-05-06 06:57:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mkwst@chromium.org/266193009/1

[commit-bot: I haz the power, 2014-05-06 06:59:16]

Change committed as 268446