Change namespace from ui to gfx for NativePixmap related code

ui/ozone/platform/drm/gpu/gbm_surface_factory.h

 // Copyright 2014 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_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_FACTORY_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_FACTORY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 22 matching lines @@
   GbmSurfaceless* GetSurface(gfx::AcceleratedWidget widget) const;
 
   // SurfaceFactoryOzone:
   std::vector<gl::GLImplementation> GetAllowedGLImplementations() override;
   GLOzone* GetGLOzone(gl::GLImplementation implementation) override;
 
   std::vector<gfx::BufferFormat> GetScanoutFormats(
       gfx::AcceleratedWidget widget) override;
   std::unique_ptr<SurfaceOzoneCanvas> CreateCanvasForWidget(
       gfx::AcceleratedWidget widget) override;
-  scoped_refptr<ui::NativePixmap> CreateNativePixmap(
+  scoped_refptr<gfx::NativePixmap> CreateNativePixmap(
       gfx::AcceleratedWidget widget,
       gfx::Size size,
       gfx::BufferFormat format,
       gfx::BufferUsage usage) override;
-  scoped_refptr<NativePixmap> CreateNativePixmapFromHandle(
+  scoped_refptr<gfx::NativePixmap> CreateNativePixmapFromHandle(
       gfx::AcceleratedWidget widget,
       gfx::Size size,
       gfx::BufferFormat format,
       const gfx::NativePixmapHandle& handle) override;
 
  private:
   std::unique_ptr<GLOzone> egl_implementation_;
   std::unique_ptr<GLOzone> osmesa_implementation_;
 
   base::ThreadChecker thread_checker_;
 
   DrmThreadProxy* drm_thread_proxy_;
 
   std::map<gfx::AcceleratedWidget, GbmSurfaceless*> widget_to_surface_map_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmSurfaceFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_FACTORY_H_