Update WindowTree::OnWindowInputEventAck to include handled

components/mus/public/cpp/input_event_handler.h

Index: components/mus/public/cpp/input_event_handler.h
diff --git a/components/mus/public/cpp/input_event_handler.h b/components/mus/public/cpp/input_event_handler.h
index ebd159717f58f48c16b513f5cb33b3171a4b20c7..797b017af23b6c0ac66b75479c2de68a21148322 100644
--- a/components/mus/public/cpp/input_event_handler.h
+++ b/components/mus/public/cpp/input_event_handler.h
@@ -18,9 +18,11 @@ class InputEventHandler {
   // The event handler can asynchronously ack the event by taking ownership of
   // the |ack_callback|. If the handler does not take ownership of the callback,
   // then WindowTreeClientImpl will ack the event.
-  virtual void OnWindowInputEvent(Window* target,
-                                  mojom::EventPtr event,
-                                  scoped_ptr<base::Closure>* ack_callback) = 0;
+  virtual void OnWindowInputEvent(
+      Window* target,
+      mojom::EventPtr event,
+      scoped_ptr<base::Callback<void(bool)>>* ack_callback) = 0;

[sky, 2016/03/01 23:08:17]

Document what the bool means.

[jonross, 2016/03/02 15:23:23]

Done.

+
  protected:
   virtual ~InputEventHandler() {}
 };