UI DevTools allows UI developers to inspect the Chrome desktop UI system like a webpage using the frontend DevTools Inspector. It is currently supported on Linux, Windows, Mac, and ChromeOS.
Run Chromium with default port 9223 and start Chromium with UI DevTools flag:
$ out/Default/chrome --enable-ui-devtools
--enable-ui-devtools=<port>
.In the Chrome Omnibox, go to chrome://inspect#other and click inspect
under UIDevToolsClient.
TODO(khamasaki): add features.