Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/http/tests/inspector-protocol/resources/iframe-navigation-secure.html 

<html>
<body>
Dummy page.
<iframe src="https://devtools.oopif-a.test:8443/inspector-protocol/resources/meta-tag.html"></iframe>
<iframe src="https://devtools.oopif-b.test:8443/inspector-protocol/resources/meta-tag.html"></iframe>
<iframe src="inspector-protocol/resources/meta-tag.html"></iframe>
</body>
</html>