Revert of [Android] Remove hardware menu button dragging support.

Revert of [Android] Remove hardware menu button dragging support. (https://codereview.chromium.org/317083005/)

Reason for revert:
AppMenuHandler.hardwareMenuButtonUp is still used by clank/java/apps/chrome/src/com/google/android/apps/chrome/Main.java:1572, hence this is causing instrumentation-yakju-clankium-tot and clang-clankium-tot-builder to fail to compile with the following error:

../../../clank/java/apps/chrome/src/com/google/android/apps/chrome/Main.java:1572: cannot find symbol
symbol  : method hardwareMenuButtonUp()
location: class org.chromium.chrome.browser.appmenu.AppMenuHandler
                mAppMenuHandler.hardwareMenuButtonUp();

Original issue's description:
> [Android] Remove hardware menu button dragging support.
> 
> This code path was broken sometime within a year, and we don't think
> it's worth to support this more.
> 
> BUG=366154
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=275395

TBR=aurimas@chromium.org,tedchoc@chromium.org,kkimlabs@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=366154
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=275447

[johnme, 2014-06-06 15:11:19]

Created Revert of [Android] Remove hardware menu button dragging support.

[commit-bot: I haz the power, 2014-06-06 15:11:51]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/johnme@chromium.org/317383002/1

[commit-bot: I haz the power, 2014-06-06 15:13:01]

Change committed as 275447