Hide/show widget on Windows screen lock/unlock

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index 1b693f8718e30fd682d56cb31f3612d1d025370c..8d8d87d22e0f74140c4ef66571c690e027d67d32 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -2301,8 +2301,14 @@ void HWNDMessageHandler::OnWindowPosChanged(WINDOWPOS* window_pos) {
 void HWNDMessageHandler::OnSessionChange(WPARAM status_code) {
   // Direct3D presents are ignored while the screen is locked, so force the
   // window to be redrawn on unlock.
-  if (status_code == WTS_SESSION_UNLOCK)
+  if (status_code == WTS_SESSION_UNLOCK) {
     ForceRedrawWindow(10);
+    if (IsVisible())
+      delegate_->HandleSoftVisibilityChanged(true);
+  } else if (status_code == WTS_SESSION_LOCK) {
+    if (IsVisible())
+      delegate_->HandleSoftVisibilityChanged(false);
+  }
 }
 
 void HWNDMessageHandler::HandleTouchEvents(const TouchEvents& touch_events) {