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chromium/third_party/blink/web_tests/external/wpt/largest-contentful-paint/invisible-images.html 

<!DOCTYPE HTML>
<title>Largest Contentful Paint: invisible images are not observable</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/invisible-images.js"></script>
<style>
  .opacity0 {
    opacity: 0;
  }
  .visibilityHidden {
    visibility: hidden;
  }
  .displayNone {
    display: none;
  }
</style>
<img src='/images/blue.png' class='opacity0' id='opacity0'/>
<img src='/images/green.png' class='visibilityHidden' id='visibilityHidden'/>
<img src='/images/red.png' class='displayNone' id='displayNone'/>
<div class='opacity0'><img src='/images/yellow.png' id='divOpacity0'/></div>
<div class='visibilityHidden'><img src='/images/yellow.png' id='divVisibilityHidden'/></div>
<div class='displayNone'><img src='/images/yellow.png' id='divDisplayNone'/></div>