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chromium/chrome/test/data/speech/web_speech_api_test-iframe.html 

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
  <title>Web Speech API IFRAME Manual Test</title>
  <meta charset="utf-8">
</head>
<body>
  <iframe width="100%" height="100%" src="web_speech_api_test.html"></iframe>
</body>
</html>