The webui_examples is a standalone example app that hosts chrome://webui-gallery without needing to build all of Chrome. This provides parity with views_examples in //ui/views/examples for WebUI components.
It can also be run with --webshell, which is a //content embedder that paints the browser UI in a WebUI.
To run the WebUI Examples Standalone App:
<output_dir>/webui_examples
To run the WebUI Browser (WebShell):
<output_dir>/webui_examples --webshell