Remove SurfaceSequence from mus client code.

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 264 matching lines @@
   void OnWindowMusMoveChild(WindowMus* parent,
                             size_t current_index,
                             size_t dest_index);
   void OnWindowMusSetVisible(WindowMus* window, bool visible);
   std::unique_ptr<WindowPortPropertyData> OnWindowMusWillChangeProperty(
       WindowMus* window,
       const void* key);
   void OnWindowMusPropertyChanged(WindowMus* window,
                                   const void* key,
                                   std::unique_ptr<WindowPortPropertyData> data);
-  void OnWindowMusSurfaceDetached(WindowMus* window,
-                                  const cc::SurfaceSequence& sequence);
 
   // Callback passed from WmPerformMoveLoop().
   void OnWmMoveLoopCompleted(uint32_t change_id, bool completed);
 
   // Overridden from WindowTreeClient:
   void OnEmbed(ClientSpecificId client_id,
                ui::mojom::WindowDataPtr root,
                ui::mojom::WindowTreePtr tree,
                int64_t display_id,
                Id focused_window_id,
@@ skipping 39 matching lines @@
                           Id window_id,
                           std::unique_ptr<ui::Event> event,
                           bool matches_pointer_watcher) override;
   void OnPointerEventObserved(std::unique_ptr<ui::Event> event,
                               uint32_t window_id) override;
   void OnWindowFocused(Id focused_window_id) override;
   void OnWindowPredefinedCursorChanged(Id window_id,
                                        ui::mojom::Cursor cursor) override;
   void OnWindowSurfaceChanged(Id window_id,
                               const cc::SurfaceId& surface_id,
-                              const cc::SurfaceSequence& surface_sequence,
                               const gfx::Size& frame_size,
                               float device_scale_factor) override;
   void OnDragDropStart(
       mojo::Map<mojo::String, mojo::Array<uint8_t>> mime_data) override;
   void OnDragEnter(Id window_id,
                    uint32_t event_flags,
                    const gfx::Point& position,
                    uint32_t effect_bitmask,
                    const OnDragEnterCallback& callback) override;
   void OnDragOver(Id window_id,
@@ skipping 152 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_