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

services/ui/ws/window_tree.cc

 // 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.
 
 #include "services/ui/ws/window_tree.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 1366 matching lines @@
 
 void WindowTree::SetCanFocus(Id transport_window_id, bool can_focus) {
   ServerWindow* window =
       GetWindowByClientId(ClientWindowId(transport_window_id));
   // TODO(sky): there should be an else case (it shouldn't route to wm and
   // policy allows, then set_can_focus).
   if (window && ShouldRouteToWindowManager(window))
     window->set_can_focus(can_focus);
 }
 
+void WindowTree::SetCanAcceptEvents(Id transport_window_id,
+                                    bool can_accept_events) {
+  ServerWindow* window =
+      GetWindowByClientId(ClientWindowId(transport_window_id));
+  // TODO(riajiang): check |event_queue_| is empty for |window|.
+  if (window && access_policy_->CanSetAcceptEvents(window))
+    window->set_can_accept_events(can_accept_events);
+}
+
 void WindowTree::SetPredefinedCursor(uint32_t change_id,
                                      Id transport_window_id,
                                      ui::mojom::Cursor cursor_id) {
   ServerWindow* window =
       GetWindowByClientId(ClientWindowId(transport_window_id));
 
   // Only the owner of the window can change the bounds.
   bool success = window && access_policy_->CanSetCursorProperties(window);
   if (success) {
     Operation op(this, window_server_,
@@ skipping 245 matching lines @@
 }
 
 bool WindowTree::IsWindowRootOfAnotherTreeForAccessPolicy(
     const ServerWindow* window) const {
   WindowTree* tree = window_server_->GetTreeWithRoot(window);
   return tree && tree != this;
 }
 
 }  // namespace ws
 }  // namespace ui