Change namespace from ui to gfx for NativePixmap related code

ui/ozone/public/surface_factory_ozone.cc

 // Copyright (c) 2013 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.
 
 #include "ui/ozone/public/surface_factory_ozone.h"
 
 #include <stdlib.h>
 
 #include "base/command_line.h"
 #include "ui/gfx/native_pixmap.h"
@@ skipping 17 matching lines @@
 std::unique_ptr<SurfaceOzoneCanvas> SurfaceFactoryOzone::CreateCanvasForWidget(
     gfx::AcceleratedWidget widget) {
   return nullptr;
 }
 
 std::vector<gfx::BufferFormat> SurfaceFactoryOzone::GetScanoutFormats(
     gfx::AcceleratedWidget widget) {
   return std::vector<gfx::BufferFormat>();
 }
 
-scoped_refptr<ui::NativePixmap> SurfaceFactoryOzone::CreateNativePixmap(
+scoped_refptr<gfx::NativePixmap> SurfaceFactoryOzone::CreateNativePixmap(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {
   return nullptr;
 }
 
-scoped_refptr<ui::NativePixmap>
+scoped_refptr<gfx::NativePixmap>
 SurfaceFactoryOzone::CreateNativePixmapFromHandle(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,
     const gfx::NativePixmapHandle& handle) {
   return nullptr;
 }
 
 }  // namespace ui