Change mojo geometry structs from using type converters to StructTraits.

ui/mojo/display/display_type_converters.cc

Index: ui/mojo/display/display_type_converters.cc
diff --git a/ui/mojo/display/display_type_converters.cc b/ui/mojo/display/display_type_converters.cc
index bc1a55d0c3f686133c669304601360ae07150fcf..5d069c6954f0aebb0bbcc68d3f8d8c363a6ee510 100644
--- a/ui/mojo/display/display_type_converters.cc
+++ b/ui/mojo/display/display_type_converters.cc
@@ -4,7 +4,6 @@
 
 #include "ui/mojo/display/display_type_converters.h"
 
-#include "mojo/converters/geometry/geometry_type_converters.h"
 #include "ui/display/display.h"
 
 namespace mojo {
@@ -17,8 +16,8 @@ TypeConverter<display::Display, mus::mojom::DisplayPtr>::Convert(
     return display::Display();
 
   display::Display result(input->id);
-  gfx::Rect pixel_bounds = input->bounds.To<gfx::Rect>();
-  gfx::Rect pixel_work_area = input->work_area.To<gfx::Rect>();
+  gfx::Rect pixel_bounds = input->bounds;
+  gfx::Rect pixel_work_area = input->work_area;
   float pixel_ratio = input->device_pixel_ratio;
 
   gfx::Rect dip_bounds =