viewport-target-densitydpi-device-and-fixed-width.html

<html>
  <head>
    <meta name='viewport' content='width=640,target-densityDpi=device-dpi,initial-scale=1.0' />
  </head>
  <body>
    A page with a viewport set to device-dpi and fixed width, fixed scale.
  </body>
</html>

chromium/third_party/blink/renderer/core/testing/data/viewport-target-densitydpi-device-and-fixed-width.html