Revert of Move GetCursor() method from WindowDelegate to its own delegate interface CursorDelegate.

Revert of Move GetCursor() method from WindowDelegate to its own delegate interface CursorDelegate. (https://codereview.chromium.org/211733003/)

Reason for revert:
http://crbug.com/357015

Original issue's description:
> Move GetCursor() method from WindowDelegate to its own delegate interface CursorDelegate.
> 
> R=sky@chromium.org
> http://crbug.com/308845
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=259631

TBR=sky@chromium.org
NOTREECHECKS=true
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=259805

[Ben Goodger (Google), 2014-03-27 06:05:26]

Created Revert of Move GetCursor() method from WindowDelegate to its own
delegate interface CursorDelegate.

[commit-bot: I haz the power, 2014-03-27 06:05:40]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ben@chromium.org/213383007/1

[commit-bot: I haz the power, 2014-03-27 06:07:06]

Change committed as 259805