Update WindowTree::OnWindowInputEventAck to include handled

content/renderer/input/input_handler_manager.h

Index: content/renderer/input/input_handler_manager.h
diff --git a/content/renderer/input/input_handler_manager.h b/content/renderer/input/input_handler_manager.h
index c8bfb75262e6d3be82b6afda9e59568086c39140..a77a67e3133f017efd834c1f806161c46d7c8460 100644
--- a/content/renderer/input/input_handler_manager.h
+++ b/content/renderer/input/input_handler_manager.h
@@ -47,7 +47,7 @@ class InputHandlerManager {
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       InputHandlerManagerClient* client,
       scheduler::RendererScheduler* renderer_scheduler);
-  ~InputHandlerManager();
+  virtual ~InputHandlerManager();
 
   // Callable from the main thread only.
   void AddInputHandler(int routing_id,
@@ -68,9 +68,10 @@ class InputHandlerManager {
   void RemoveInputHandler(int routing_id);
 
   // Called from the compositor's thread.
-  InputEventAckState HandleInputEvent(int routing_id,
-                                      const blink::WebInputEvent* input_event,
-                                      ui::LatencyInfo* latency_info);
+  virtual InputEventAckState HandleInputEvent(
+      int routing_id,
+      const blink::WebInputEvent* input_event,
+      ui::LatencyInfo* latency_info);
 
   // Called from the compositor's thread.
   void DidOverscroll(int routing_id, const DidOverscrollParams& params);