Change namespace from ui to gfx for NativePixmap related code

ui/ozone/public/surface_factory_ozone.h

Index: ui/ozone/public/surface_factory_ozone.h
diff --git a/ui/ozone/public/surface_factory_ozone.h b/ui/ozone/public/surface_factory_ozone.h
index 7f1520d4983ab6a7a10623c0130cf05a58d9432b..6e7726a660cd7ae319132e455f51f51883df75f6 100644
--- a/ui/ozone/public/surface_factory_ozone.h
+++ b/ui/ozone/public/surface_factory_ozone.h
@@ -23,9 +23,12 @@
 #include "ui/ozone/ozone_base_export.h"
 #include "ui/ozone/public/gl_ozone.h"
 
+namespace gfx {
+class NativePixmap;
+}
+
 namespace ui {
 
-class NativePixmap;
 class SurfaceOzoneCanvas;
 
 // The Ozone interface allows external implementations to hook into Chromium to
@@ -82,7 +85,7 @@ class OZONE_BASE_EXPORT SurfaceFactoryOzone {
   // for |widget| representing a particular display controller or default
   // display controller for kNullAcceleratedWidget.
   // It can be called on any thread.
-  virtual scoped_refptr<NativePixmap> CreateNativePixmap(
+  virtual scoped_refptr<gfx::NativePixmap> CreateNativePixmap(
       gfx::AcceleratedWidget widget,
       gfx::Size size,
       gfx::BufferFormat format,
@@ -90,7 +93,7 @@ class OZONE_BASE_EXPORT SurfaceFactoryOzone {
 
   // Create a single native buffer from an existing handle. Takes ownership of
   // |handle| and can be called on any thread.
-  virtual scoped_refptr<NativePixmap> CreateNativePixmapFromHandle(
+  virtual scoped_refptr<gfx::NativePixmap> CreateNativePixmapFromHandle(
       gfx::AcceleratedWidget widget,
       gfx::Size size,
       gfx::BufferFormat format,