mus: Disregard windows that explicitly set can_accept_events to be false when sending events.

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 @@
   bool AddWindow(const ClientWindowId& parent_id,
                  const ClientWindowId& child_id);
   bool AddTransientWindow(const ClientWindowId& window_id,
                           const ClientWindowId& transient_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);
+  void SetCanAcceptEvents(Id transport_window_id,
+                          bool can_accept_events) override;
   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);
@@ skipping 313 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_