gl: Check format is valid given an internal format.

ui/gl/gl_image_ozone_native_pixmap.h

Index: ui/gl/gl_image_ozone_native_pixmap.h
diff --git a/ui/gl/gl_image_ozone_native_pixmap.h b/ui/gl/gl_image_ozone_native_pixmap.h
index caa88a0650b6eb0bad9e440b44eba93f426d393b..a9137739f310d3dd27266141ae4ca05264ec0958 100644
--- a/ui/gl/gl_image_ozone_native_pixmap.h
+++ b/ui/gl/gl_image_ozone_native_pixmap.h
@@ -33,6 +33,8 @@ class GL_EXPORT GLImageOzoneNativePixmap : public GLImageEGL {
                     uint64_t process_tracing_id,
                     const std::string& dump_name) override;
 
+  static unsigned GetInternalFormatForTesting(gfx::BufferFormat format);
+
  protected:
   ~GLImageOzoneNativePixmap() override;