<!DOCTYPE html>
<!--
 | If the height of the child is a percent of the height of the containing
 | block and the containing block's height is produced from top and bottom,
 | the height of the child should be properly calculated.
 |   https://www.w3.org/TR/CSS21/visudet.html#the-height-property
 |   https://www.w3.org/TR/CSS21/visuren.html#propdef-top
 |   https://www.w3.org/TR/CSS21/visuren.html#propdef-bottom
 -->
<html>
<head>
  <style">
    body {
      background-color: #FFFFFF;
    }
    .container {
      position: absolute;
      height: 300px;
      width: 100px;
    }
    .top-bottom {
      background-color: #EA4335;
      position: absolute;
      top: 10px;
      bottom: 0px;
      left: 10px;
      width: 100px;
    }
    .percent-height {
      background-color: #4285F4;
      height: 100%;
      position: relative;
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="top-bottom">
      <div class="percent-height"></div>
    </div>
  </div>
</body>
</html>