Makes display roots be destroyed by client

services/ui/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 SERVICES_UI_WS_WINDOW_TREE_H_
 #define SERVICES_UI_WS_WINDOW_TREE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 149 matching lines @@
   // These functions are synchronous variants of those defined in the mojom. The
   // WindowTree implementations all call into these. See the mojom for details.
   bool SetCapture(const ClientWindowId& client_window_id);
   bool ReleaseCapture(const ClientWindowId& client_window_id);
   bool NewWindow(const ClientWindowId& client_window_id,
                  const std::map<std::string, std::vector<uint8_t>>& properties);
   bool AddWindow(const ClientWindowId& parent_id,
                  const ClientWindowId& child_id);
   bool AddTransientWindow(const ClientWindowId& window_id,
                           const ClientWindowId& transient_window_id);
+  bool DeleteWindow(const ClientWindowId& window_id);
   bool SetModal(const ClientWindowId& window_id);
   std::vector<const ServerWindow*> GetWindowTree(
       const ClientWindowId& window_id) const;
   bool SetWindowVisibility(const ClientWindowId& window_id, bool visible);
   bool SetWindowOpacity(const ClientWindowId& window_id, float opacity);
   bool SetFocus(const ClientWindowId& window_id);
   bool Embed(const ClientWindowId& window_id,
              mojom::WindowTreeClientPtr client,
              uint32_t flags);
   void DispatchInputEvent(ServerWindow* target, const ui::Event& event);
 
   bool IsWaitingForNewTopLevelWindow(uint32_t wm_change_id);
   void OnWindowManagerCreatedTopLevelWindow(uint32_t wm_change_id,
                                             uint32_t client_change_id,
                                             const ServerWindow* window);
   void AddActivationParent(const ClientWindowId& window_id);
 
   // Calls through to the client.
   void OnChangeCompleted(uint32_t change_id, bool success);
   // |state_to_ack| is the WindowManagerState to call through to when the ack
   // from the accelerator is received. If |needs_ack| is true an ack is
   // required.
   void OnAccelerator(uint32_t accelerator_id,
                      const ui::Event& event,
                      bool needs_ack);
 
+  // Called when a display has been removed. This is only called on the
+  // WindowTree associated with a WindowManager.
+  void OnDisplayDestroying(int64_t display_id);
+
   // Called when |tree|'s jankiness changes (see janky_ for definition).
   // Notifies the window manager client so it can update UI for the affected
   // window(s).
   void ClientJankinessChanged(WindowTree* tree);
 
   // The following methods are invoked after the corresponding change has been
   // processed. They do the appropriate bookkeeping and update the client as
   // necessary.
   void ProcessWindowBoundsChanged(const ServerWindow* window,
                                   const gfx::Rect& old_bounds,
@@ skipping 352 matching lines @@
       waiting_for_top_level_window_info_;
   bool embedder_intercepts_events_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTree);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_TREE_H_