Implement WebGLRenderingContextBase.getAttachedShaders

components/script/dom/webglrenderingcontext.rs

@@ -3598,6 +3598,14 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
             None => self.webgl_error(InvalidOperation),
         };
     }
+
+    /// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
+    fn GetAttachedShaders(
+        &self,
+        program: &WebGLProgram,
+    ) -> Option<Vec<DomRoot<WebGLShader>>> {
+        handle_potential_webgl_error!(self, program.attached_shaders().map(Some), None)
+    }
 }
 
 pub trait LayoutCanvasWebGLRenderingContextHelpers {