Hide/show widget on Windows screen lock/unlock

ui/views/view.cc

Index: ui/views/view.cc
diff --git a/ui/views/view.cc b/ui/views/view.cc
index 6f5122faae7caacc663d07dbb8ed4355005aa0c8..867f943d6a889c80a17e3b2b4e1e0a4f2871cb54 100644
--- a/ui/views/view.cc
+++ b/ui/views/view.cc
@@ -1906,6 +1906,12 @@ void View::PropagateNativeThemeChanged(const ui::NativeTheme* theme) {
   OnNativeThemeChanged(theme);
 }
 
+void View::PropagateSoftVisibilityChanged(bool visible) {
+  for (int i = 0, count = child_count(); i < count; ++i)
+    child_at(i)->PropagateSoftVisibilityChanged(visible);
+  OnSoftVisibilityChanged(visible);
+}
+
 // Size and disposition --------------------------------------------------------
 
 void View::PropagateVisibilityNotifications(View* start, bool is_visible) {