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.
> 
> [email protected]
> http://crbug.com/308845
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=259631

[email protected]
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/213383007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@259805 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ui/aura/demo/demo_main.cc b/ui/aura/demo/demo_main.cc
index a7a21cc..548aeded 100644
--- a/ui/aura/demo/demo_main.cc
+++ b/ui/aura/demo/demo_main.cc
@@ -49,6 +49,9 @@
 
   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
                                const gfx::Rect& new_bounds) OVERRIDE {}
+  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
+    return gfx::kNullCursor;
+  }
   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE {
     return HTCAPTION;
   }