In aura mus, WindowManagerClient::AddAccelerator() should take an array.

ui/aura/mus/window_tree_client.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 UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 #define UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 381 matching lines @@
                          const gfx::Point& cursor_location) override;
   void WmCancelMoveLoop(uint32_t window_id) override;
   void OnAccelerator(uint32_t ack_id,
                      uint32_t accelerator_id,
                      std::unique_ptr<ui::Event> event) override;
 
   // Overridden from WindowManagerClient:
   void SetFrameDecorationValues(
       ui::mojom::FrameDecorationValuesPtr values) override;
   void SetNonClientCursor(Window* window, ui::mojom::Cursor cursor_id) override;
-  void AddAccelerator(uint32_t id,
-                      ui::mojom::EventMatcherPtr event_matcher,
-                      const base::Callback<void(bool)>& callback) override;
+  void AddAccelerators(std::vector<ui::mojom::AcceleratorPtr> accelerators,
+                       const base::Callback<void(bool)>& callback) override;
   void RemoveAccelerator(uint32_t id) override;
   void AddActivationParent(Window* window) override;
   void RemoveActivationParent(Window* window) override;
   void ActivateNextWindow() override;
   void SetUnderlaySurfaceOffsetAndExtendedHitArea(
       Window* window,
       const gfx::Vector2d& offset,
       const gfx::Insets& hit_area) override;
   void RequestClose(Window* window) override;
 
@@ skipping 101 matching lines @@
   std::unique_ptr<DragDropControllerMus> drag_drop_controller_;
 
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_MUS_WINDOW_TREE_CLIENT_H_