ozone: Implement support for CreateGpuMemoryBufferFromHandle for OzoneNativePixmap backed GMBs.

ui/ozone/public/surface_factory_ozone.cc

Index: ui/ozone/public/surface_factory_ozone.cc
diff --git a/ui/ozone/public/surface_factory_ozone.cc b/ui/ozone/public/surface_factory_ozone.cc
index f3aa16b24b0678f2193ae7f66e59c931e7e2dda6..84c318eb325cd79b7b1512bf85d2f9b860067bef 100644
--- a/ui/ozone/public/surface_factory_ozone.cc
+++ b/ui/ozone/public/surface_factory_ozone.cc
@@ -49,7 +49,13 @@ scoped_refptr<ui::NativePixmap> SurfaceFactoryOzone::CreateNativePixmap(
     gfx::Size size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {
-  return NULL;
+  return nullptr;
+}
+
+scoped_refptr<ui::NativePixmap>
+SurfaceFactoryOzone::CreateNativePixmapFromHandle(
+    const gfx::NativePixmapHandle& handle) {
+  return nullptr;
 }
 
 }  // namespace ui