  void CreateNewRendererCompositorFrameSink() {
    viz::mojom::CompositorFrameSinkPtr sink;
    viz::mojom::CompositorFrameSinkRequest sink_request =
        mojo::MakeRequest(&sink);
    viz::mojom::CompositorFrameSinkClientRequest client_request =
        mojo::MakeRequest(&renderer_compositor_frame_sink_ptr_);
    renderer_compositor_frame_sink_ =
        std::make_unique<FakeRendererCompositorFrameSink>(
            std::move(sink), std::move(client_request));
    DidCreateNewRendererCompositorFrameSink(
        renderer_compositor_frame_sink_ptr_.get());
  }

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.