Change mojo geometry structs from using type converters to StructTraits.

ui/gfx/geometry/mojo/geometry_util.h

-// Copyright 2016 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.
-
-#ifndef UI_GFX_GEOMETRY_MOJO_GEOMETRY_UTIL_H_
-#define UI_GFX_GEOMETRY_MOJO_GEOMETRY_UTIL_H_
-
-#include "ui/gfx/geometry/mojo/geometry.mojom.h"
-
-namespace mojo {
-
-inline bool operator==(const Rect& lhs, const Rect& rhs) {
-  return lhs.x == rhs.x && lhs.y == rhs.y && lhs.width == rhs.width &&
-         lhs.height == lhs.height;
-}
-
-inline bool operator!=(const Rect& lhs, const Rect& rhs) {
-  return !(lhs == rhs);
-}
-
-inline bool operator==(const Size& lhs, const Size& rhs) {
-  return lhs.width == rhs.width && lhs.height == rhs.height;
-}
-
-inline bool operator!=(const Size& lhs, const Size& rhs) {
-  return !(lhs == rhs);
-}
-
-inline bool operator==(const Point& lhs, const Point& rhs) {
-  return lhs.x == rhs.x && lhs.y == rhs.y;
-}
-
-inline bool operator!=(const Point& lhs, const Point& rhs) {
-  return !(lhs == rhs);
-}
-
-}
-
-#endif  // UI_GFX_GEOMETRY_MOJO_GEOMETRY_UTIL_H_