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chromium/third_party/blink/renderer/core/testing/data/resize_scroll_minimum_scale.html 

<html>
<head>
  <meta name="viewport" content="width=device-width, minimum-scale=1">
</head>
<body style="margin:0px; padding:0px"><div style="width:280px; background-color:red">Wide div forcing page to widen only in portrait orientation (240x320px)</div></body>
</html>