mus: Server-side implementation of modal windows

components/mus/ws/connection_manager.cc

Index: components/mus/ws/connection_manager.cc
diff --git a/components/mus/ws/connection_manager.cc b/components/mus/ws/connection_manager.cc
index 4ef846194ae22c000aecbfc41f79eb63bbe76413..f67713b28251807e4316d29974d73fef0767ce68 100644
--- a/components/mus/ws/connection_manager.cc
+++ b/components/mus/ws/connection_manager.cc
@@ -461,6 +461,11 @@ void ConnectionManager::OnWindowHierarchyChanged(ServerWindow* window,
   if (in_destructor_)
     return;
 
+  WindowManagerState* wms =
+      display_manager_->GetWindowManagerAndDisplay(window).window_manager_state;
+  if (wms)
+    wms->ReleaseCaptureBlockedByAnyModalWindow();
+
   ProcessWindowHierarchyChanged(window, new_parent, old_parent);
 
   // TODO(beng): optimize.
@@ -526,6 +531,16 @@ void ConnectionManager::OnWillChangeWindowVisibility(ServerWindow* window) {
   }
 }
 
+void ConnectionManager::OnWindowVisibilityChanged(ServerWindow* window) {
+  if (in_destructor_)
+    return;
+
+  WindowManagerState* wms =
+      display_manager_->GetWindowManagerAndDisplay(window).window_manager_state;
+  if (wms)
+    wms->ReleaseCaptureBlockedByModalWindow(window);
+}
+
 void ConnectionManager::OnWindowPredefinedCursorChanged(ServerWindow* window,
                                                         int32_t cursor_id) {
   if (in_destructor_)