Change namespace from ui to gfx for NativePixmap related code

ui/ozone/platform/wayland/wayland_surface_factory.cc

Index: ui/ozone/platform/wayland/wayland_surface_factory.cc
diff --git a/ui/ozone/platform/wayland/wayland_surface_factory.cc b/ui/ozone/platform/wayland/wayland_surface_factory.cc
index b5f365b4e03e8a6106492c892a2654bcf101029a..11a2ad10bbd96ddd3741bd68af81dbaa31b2ab03 100644
--- a/ui/ozone/platform/wayland/wayland_surface_factory.cc
+++ b/ui/ozone/platform/wayland/wayland_surface_factory.cc
@@ -222,7 +222,7 @@ GLOzone* WaylandSurfaceFactory::GetGLOzone(
   }
 }
 
-scoped_refptr<NativePixmap> WaylandSurfaceFactory::CreateNativePixmap(
+scoped_refptr<gfx::NativePixmap> WaylandSurfaceFactory::CreateNativePixmap(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,
@@ -231,7 +231,8 @@ scoped_refptr<NativePixmap> WaylandSurfaceFactory::CreateNativePixmap(
   return nullptr;
 }
 
-scoped_refptr<NativePixmap> WaylandSurfaceFactory::CreateNativePixmapFromHandle(
+scoped_refptr<gfx::NativePixmap>
+WaylandSurfaceFactory::CreateNativePixmapFromHandle(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,