Support creation of toplevel mus::Windows on separate displays

services/ui/public/cpp/window_tree_client.cc

Index: services/ui/public/cpp/window_tree_client.cc
diff --git a/services/ui/public/cpp/window_tree_client.cc b/services/ui/public/cpp/window_tree_client.cc
index 11e73b05533d8f45fb7c94dd285dadeb1e01723d..9d73e5ba91263805e91e29a3cad76c861d4135b8 100644
--- a/services/ui/public/cpp/window_tree_client.cc
+++ b/services/ui/public/cpp/window_tree_client.cc
@@ -5,7 +5,6 @@
 #include "services/ui/public/cpp/window_tree_client.h"
 
 #include <stddef.h>
-
 #include <string>
 #include <utility>
 #include <vector>
@@ -503,6 +502,7 @@ Window* WindowTreeClient::NewWindowImpl(
   DCHECK(tree_);
   Window* window =
       new Window(this, MakeTransportId(client_id_, next_window_id_++));
+
   if (properties)
     window->properties_ = *properties;
   AddWindow(window);
@@ -518,6 +518,15 @@ Window* WindowTreeClient::NewWindowImpl(
         mojo::Map<mojo::String, mojo::Array<uint8_t>>::From(*properties);
   }
   if (type == NewWindowType::CHILD) {
+    //   LOG(ERROR) << "\n\n  WindowTreeClient::NewWindowImpl
+    //   transport_properties ";
+    // for (auto i = transport_properties.begin(); i !=
+    // transport_properties.end(); ++i)
+    //   {
+    //     LOG(ERROR) << "\n transport_properties->first " << i->first;
+    //     // do something with it here like adding it to a vector
+    //   }
+
     tree_->NewWindow(change_id, server_id(window),
                      std::move(transport_properties));
   } else {