StructTraits to map mus::mojom::Event to unique_ptr<ui::Event>

components/mus/public/cpp/tests/window_tree_client_private.cc

 // Copyright 2016 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/public/cpp/tests/window_tree_client_private.h"
 
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_tree_client.h"
 #include "ui/events/mojo/input_events_type_converters.h"
 
@@ skipping 19 matching lines @@
   root_data->properties.SetToEmpty();
   root_data->visible = true;
   const int64_t display_id = 1;
   const Id focused_window_id = 0;
   tree_client_impl_->OnEmbedImpl(window_tree, 1, std::move(root_data),
                                  display_id, focused_window_id, true);
 }
 
 void WindowTreeClientPrivate::CallOnWindowInputEvent(
     Window* window,
-    const ui::Event& event) {
+    std::unique_ptr<ui::Event> event) {
   const uint32_t event_id = 0u;
   const uint32_t observer_id = 0u;
   tree_client_impl_->OnWindowInputEvent(event_id, window->server_id(),
-                                        mojom::Event::From(event), observer_id);
+                                        std::move(event), observer_id);
 }
 
 }  // namespace mus