Change mojo geometry structs from using type converters to StructTraits.

ui/gfx/gfx.gyp

Index: ui/gfx/gfx.gyp
diff --git a/ui/gfx/gfx.gyp b/ui/gfx/gfx.gyp
index 0641908f9ce8b6632380a89b20d966e5c7a9fbd1..5d1a4d24a54e91c3c5715789ada5b5327ee0b125 100644
--- a/ui/gfx/gfx.gyp
+++ b/ui/gfx/gfx.gyp
@@ -71,17 +71,21 @@
       ],
     },
     {
-      # GN version: //ui/gfx/geometry/mojo:interfaces
+      # GN version: //ui/gfx/geometry/mojo
       'target_name': 'mojo_geometry_bindings_mojom',
       'type': 'none',
       'variables': {
         'mojom_files': [
           'geometry/mojo/geometry.mojom',
         ],
+        'mojom_typemaps': [
+          'geometry/mojo/geometry.typemap',
+        ],
       },
       'includes': [ '../../mojo/mojom_bindings_generator_explicit.gypi' ],
     },
     {
+      # GN version: //ui/gfx/geometry/mojo
       'target_name': 'mojo_geometry_bindings',
       'type': 'static_library',
       'dependencies': [
@@ -90,24 +94,6 @@
       ],
     },
     {
-      # GN version: //ui/gfx/geometry/mojo
-      'target_name': 'mojo_geometry_lib',
-      'type': '<(component)',
-      'defines': [
-        'MOJO_GEOMETRY_IMPLEMENTATION',
-      ],
-      'dependencies': [
-        'mojo_geometry_bindings',
-        'gfx_geometry',
-        '<(mojo_system_for_component)',
-      ],
-      'sources': [
-        'geometry/mojo/geometry_type_converters.cc',
-        'geometry/mojo/geometry_type_converters.h',
-        'geometry/mojo/mojo_geometry_export.h',
-      ],
-    },
-    {
       'target_name': 'gfx_range',
       'type': '<(component)',
       'dependencies': [