Codebase Browser
chromium
Go to App

chromium/chrome/test/data/extensions/platform_apps/web_view/load_webview_accessible_resource/guest.html 

<!doctype html>
<!--
Copyright 2015 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<html>
<body>
  <img src="chrome-extension://lmnhajohhbenlbinimlfhbpnciehhmao/assets/test.bmp"></img>
</body>
</html>