Surface synchronization: Don't gutter translucent windows

ui/views/mus/mus_client.cc

Index: ui/views/mus/mus_client.cc
diff --git a/ui/views/mus/mus_client.cc b/ui/views/mus/mus_client.cc
index 03093279c11e9cab341d49fe5d79c4710852f78d..eb48bd23c98f1bff4945d4646b36041b88bddbdb 100644
--- a/ui/views/mus/mus_client.cc
+++ b/ui/views/mus/mus_client.cc
@@ -171,6 +171,10 @@ MusClient::ConfigurePropertiesFromParams(
   properties[WindowManager::kFocusable_InitProperty] =
       mojo::ConvertTo<TransportType>(init_params.CanActivate());
 
+  properties[WindowManager::kTranslucent_InitProperty] =
+      mojo::ConvertTo<TransportType>(init_params.opacity ==
+                                     Widget::InitParams::TRANSLUCENT_WINDOW);
+
   if (!init_params.bounds.IsEmpty()) {
     properties[WindowManager::kBounds_InitProperty] =
         mojo::ConvertTo<TransportType>(init_params.bounds);