Wire up CursorManager for DesktopWindowTreeHostMus

ui/views/widget/desktop_aura/desktop_window_tree_host.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host.h
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host.h b/ui/views/widget/desktop_aura/desktop_window_tree_host.h
index e8bfb9df4f47f9fc4ea9764b6d12cf4f892db51e..6528cf5446bbffdacd239d66c6cb01702af5071b 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host.h
@@ -162,6 +162,11 @@ class VIEWS_EXPORT DesktopWindowTreeHost {
   // Returns true if the transparency of the DesktopNativeWidgetAura's
   // |content_window_| should change.
   virtual bool ShouldUpdateWindowTransparency() const = 0;
+
+  // A return value of true indicates DesktopNativeCursorManager should be
+  // used, a return value of false indicates the DesktopWindowTreeHost manages
+  // cursors itself.
+  virtual bool ShouldUseDesktopNativeCursorManager() const = 0;
 };
 
 }  // namespace views