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chromium
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chromium/third_party/blink/web_tests/mhtml/prefetch-preload.mhtml_original 

<html>
<link rel="prefetch" href="http://test/resources/style1.css">
<link rel="preload" as="style" href="http://test/resources/style2.css">
<link rel="stylesheet" href="http://test/resources/style1.css">
<link rel="stylesheet" href="http://test/resources/style2.css">
<img class="foo" src="http://test/resources/red_square.png">
</html>