Update WindowTree::OnWindowInputEventAck to include handled

components/mus/ws/window_tree_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/mus/ws/window_tree_impl.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 1120 matching lines @@
   if (success) {
     if (!state.is_null())
       window->SetTextInputState(state.To<ui::TextInputState>());
 
     WindowTreeHostImpl* host = GetHost(window);
     if (host)
       host->SetImeVisibility(window, visible);
   }
 }
 
-void WindowTreeImpl::OnWindowInputEventAck(uint32_t event_id) {
+void WindowTreeImpl::OnWindowInputEventAck(uint32_t event_id, bool handled) {
   if (event_ack_id_ == 0 || event_id != event_ack_id_) {
     // TODO(sad): Something bad happened. Kill the client?
     NOTIMPLEMENTED() << "Wrong event acked.";
   }
   event_ack_id_ = 0;
 
   WindowTreeHostImpl* event_source_host = event_source_host_;
   event_source_host_ = nullptr;
   if (event_source_host)
     event_source_host->OnEventAck(this);
@@ skipping 213 matching lines @@
 
   for (const auto* root : roots_) {
     if (root->Contains(window))
       return true;
   }
   return false;
 }
 
 }  // namespace ws
 }  // namespace mus