LibWeb/WebGL: Request GL_ANGLE_instanced_arrays extension when required

Author: https://github.com/Lubrsi
Commit: 58942e1137
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3239
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/kalenikaliaksandr

Libraries/LibWeb/WebGL/OpenGLContext.cpp

@@ -313,4 +313,14 @@ Vector<String> OpenGLContext::get_supported_extensions()
 #endif
 }
 
+void OpenGLContext::request_extension(char const* extension_name)
+{
+#ifdef AK_OS_MACOS
+    make_current();
+    glRequestExtensionANGLE(extension_name);
+#else
+    (void)extension_name;
+#endif
+}
+
 }