mash: Convert OnWindowInputEventAck to use an enum for handled status

components/mus/ws/window_tree.h

 // 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.
 
 #ifndef COMPONENTS_MUS_WS_WINDOW_TREE_H_
 #define COMPONENTS_MUS_WS_WINDOW_TREE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 347 matching lines @@
   void SetFocus(uint32_t change_id, Id transport_window_id) override;
   void SetCanFocus(Id transport_window_id, bool can_focus) override;
   void SetPredefinedCursor(uint32_t change_id,
                            Id transport_window_id,
                            mus::mojom::Cursor cursor_id) override;
   void SetWindowTextInputState(Id transport_window_id,
                                mojo::TextInputStatePtr state) override;
   void SetImeVisibility(Id transport_window_id,
                         bool visible,
                         mojo::TextInputStatePtr state) override;
-  void OnWindowInputEventAck(uint32_t event_id, bool handled) override;
+  void OnWindowInputEventAck(uint32_t event_id,
+                             mojom::EventResult result) override;
   void SetClientArea(
       Id transport_window_id,
       mojo::InsetsPtr insets,
       mojo::Array<mojo::RectPtr> transport_additional_client_areas) override;
   void GetWindowManagerClient(
       mojo::AssociatedInterfaceRequest<mojom::WindowManagerClient> internal)
       override;
 
   // mojom::WindowManagerClient:
   void AddAccelerator(uint32_t id,
@@ skipping 60 matching lines @@
 
   scoped_ptr<WaitingForTopLevelWindowInfo> waiting_for_top_level_window_info_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTree);
 };
 
 }  // namespace ws
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_WS_WINDOW_TREE_H_