Migrate ui::Transform to gfx::Transform

ui/gfx/transform_util.h

 // Copyright (c) 2012 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_TRANSFORM_UTIL_H_
 #define UI_GFX_TRANSFORM_UTIL_H_
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
+
 class Point;
-}
-
-namespace ui {
 
 // Returns a scale transform at |anchor| point.
-UI_EXPORT Transform GetScaleTransform(const gfx::Point& anchor, float scale);
+UI_EXPORT Transform GetScaleTransform(const Point& anchor, float scale);
 
-}  // namespace ui
+}  // namespace gfx
 
 #endif  // UI_GFX_TRANSFORM_UTIL_H_