Change namespace from ui to gfx for NativePixmap related code

gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h

Index: gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
diff --git a/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h b/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
index de5ee21a1afc5cd71f04b4a6d39826af03247cd2..9bb4db7ce5e1cdb707e391b87782994e3f5359dd 100644
--- a/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
+++ b/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h
@@ -58,10 +58,9 @@ class GPU_EXPORT GpuMemoryBufferFactoryOzoneNativePixmap
  private:
   using NativePixmapMapKey = std::pair<int, int>;
   using NativePixmapMapKeyHash = base::IntPairHash<NativePixmapMapKey>;
-  using NativePixmapMap =
-      std::unordered_map<NativePixmapMapKey,
-                         scoped_refptr<ui::NativePixmap>,
-                         NativePixmapMapKeyHash>;
+  using NativePixmapMap = std::unordered_map<NativePixmapMapKey,
+                                             scoped_refptr<gfx::NativePixmap>,
+                                             NativePixmapMapKeyHash>;
   NativePixmapMap native_pixmaps_;
   base::Lock native_pixmaps_lock_;