Mus+Ash: Use standard cc mechanism for surface lifetime.

services/ui/ws/server_window.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 SERVICES_UI_WS_SERVER_WINDOW_H_
 #define SERVICES_UI_WS_SERVER_WINDOW_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 38 matching lines @@
   using Windows = std::vector<ServerWindow*>;
 
   ServerWindow(ServerWindowDelegate* delegate, const WindowId& id);
   ServerWindow(ServerWindowDelegate* delegate,
                const WindowId& id,
                const Properties& properties);
   ~ServerWindow();
 
   void AddObserver(ServerWindowObserver* observer);
   void RemoveObserver(ServerWindowObserver* observer);
+  bool HasObserver(ServerWindowObserver* observer);
 
   // Creates a new surface of the specified type, replacing the existing.
   void CreateSurface(mojom::SurfaceType surface_type,
                      mojo::InterfaceRequest<mojom::Surface> request,
                      mojom::SurfaceClientPtr client);
 
   const WindowId& id() const { return id_; }
 
   void Add(ServerWindow* child);
   void Remove(ServerWindow* child);
@@ skipping 85 matching lines @@
   void set_can_focus(bool can_focus) { can_focus_ = can_focus; }
   bool can_focus() const { return can_focus_; }
 
   void set_can_accept_events(bool value) { can_accept_events_ = value; }
   bool can_accept_events() const { return can_accept_events_; }
 
   // Returns true if this window is attached to a root and all ancestors are
   // visible.
   bool IsDrawn() const;
 
-  // Called when its appropriate to destroy surfaces scheduled for destruction.
-  void DestroySurfacesScheduledForDestruction();
-
   const gfx::Insets& extended_hit_test_region() const {
     return extended_hit_test_region_;
   }
   void set_extended_hit_test_region(const gfx::Insets& insets) {
     extended_hit_test_region_ = insets;
   }
 
   ServerWindowSurfaceManager* GetOrCreateSurfaceManager();
   ServerWindowSurfaceManager* surface_manager() {
     return surface_manager_.get();
@@ skipping 76 matching lines @@
 
   base::ObserverList<ServerWindowObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ServerWindow);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_SERVER_WINDOW_H_