Change mojo geometry structs from using type converters to StructTraits.

components/mus/public/cpp/tests/window_tree_client_impl_private.cc

Index: components/mus/public/cpp/tests/window_tree_client_impl_private.cc
diff --git a/components/mus/public/cpp/tests/window_tree_client_impl_private.cc b/components/mus/public/cpp/tests/window_tree_client_impl_private.cc
index 28f6b0ff101afe87268f8698efd8ba77792f890f..bc7704f3203c5fa5c8393b8cac94829e84aba6f1 100644
--- a/components/mus/public/cpp/tests/window_tree_client_impl_private.cc
+++ b/components/mus/public/cpp/tests/window_tree_client_impl_private.cc
@@ -6,7 +6,6 @@
 
 #include "components/mus/public/cpp/lib/window_tree_client_impl.h"
 #include "components/mus/public/cpp/window.h"
-#include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
 
 namespace mus {
@@ -28,12 +27,10 @@ void WindowTreeClientImplPrivate::OnEmbed(mojom::WindowTree* window_tree) {
   mojom::WindowDataPtr root_data(mojom::WindowData::New());
   root_data->parent_id = 0;
   root_data->window_id = 1;
-  root_data->bounds = mojo::Rect::From(gfx::Rect());
   root_data->properties.SetToEmpty();
   root_data->visible = true;
   root_data->viewport_metrics = mojom::ViewportMetrics::New();
-  root_data->viewport_metrics->size_in_pixels =
-      mojo::Size::From(gfx::Size(1000, 1000));
+  root_data->viewport_metrics->size_in_pixels.SetSize(1000, 1000);
   root_data->viewport_metrics->device_pixel_ratio = 1;
   tree_client_impl_->OnEmbedImpl(window_tree, 1, std::move(root_data), 0, true);
 }