Make event-targeting asynchronous in window server.

services/ui/ws/window_server.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_SERVER_H_
 #define SERVICES_UI_WS_WINDOW_SERVER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 19 matching lines @@
 
 namespace ui {
 namespace ws {
 
 class AccessPolicy;
 class Display;
 class DisplayManager;
 class GpuHost;
 class ServerWindow;
 class UserActivityMonitor;
+class WindowManagerDisplayRoot;
 class WindowManagerState;
 class WindowServerDelegate;
 class WindowTree;
 class WindowTreeBinding;
 
 // WindowServer manages the set of clients of the window server (all the
 // WindowTrees) as well as providing the root of the hierarchy.
 class WindowServer : public ServerWindowDelegate,
                      public ServerWindowObserver,
                      public GpuHostDelegate,
@@ skipping 226 matching lines @@
   // Updates the native cursor by figuring out what window is under the mouse
   // cursor. This is run in response to events that change the bounds or window
   // hierarchy.
   void UpdateNativeCursorFromMouseLocation(ServerWindow* window);
 
   // Updates the native cursor if the cursor is currently inside |window|. This
   // is run in response to events that change the mouse cursor properties of
   // |window|.
   void UpdateNativeCursorIfOver(ServerWindow* window);
 
+  void OnCursorUpdated(WindowManagerDisplayRoot* display_root);
+
   bool IsUserInHighContrastMode(const UserId& user) const;
 
   // Finds the parent client that will embed |surface_id| and claims ownership
   // of the temporary reference. If no parent client is found then tell GPU to
   // immediately drop the temporary reference. |window| is the ServerWindow
   // that corresponds to |surface_id|.
   void HandleTemporaryReferenceForNewSurface(const cc::SurfaceId& surface_id,
                                              ServerWindow* window);
 
   // Overridden from ServerWindowDelegate:
@@ skipping 92 matching lines @@
       frame_sink_manager_client_binding_;
   cc::mojom::FrameSinkManagerPtr frame_sink_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowServer);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_SERVER_H_