Change mojo geometry structs from using type converters to StructTraits.

ui/gfx/mojo/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 component("mojo") {
   output_name = "mojo_transform_lib"
 
   public_deps = [
     "//ui/gfx",
   ]
   deps = [
     "//mojo/public/c/system:for_component",
     "//skia",
-    "//ui/gfx/geometry/mojo:interfaces",
+    "//ui/gfx/geometry/mojo",
   ]
 
   defines = [ "MOJO_TRANSFORM_IMPLEMENTATION" ]
 
   sources = [
     "mojo_transform_export.h",
     "transform_type_converters.cc",
     "transform_type_converters.h",
   ]
 }