title: Single-row grid with height 1fr not filling height in Chrome
body: <p>I have a CSS Grid inside a Flexbox column, and the grid has <code>flex-grow: 1</code>.</p>
  
  <p>In Chrome, the grid expands to fill available space, but its content does not, even with <code>align-content: stretch</code> on the grid. In Firefox and Edge, the content expands to fill the grid's height, as desired.</p>
  
  <p><a href="https://codepen.io/FTWinston/pen/BJgEOR?editors=1100" rel="nofollow noreferrer">Here's a pen that reproduces the problem</a>, and images of how it looks in different browsers. Is this a bug with Chrome, and if so, can anyone suggest a straightforward workaround?</p>
  
  <p><strong>Chrome</strong></p>
  
  <p><a href="https://i.stack.imgur.com/zCvfc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zCvfc.png" alt="Pen in chrome, showing the bug"></a></p>
  
  <p><strong>Firefox</strong></p>
  
  <p><a href="https://i.stack.imgur.com/TfUEB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TfUEB.png" alt="Pen in firefox, showing desired behaviour"></a></p>
  
  <p><strong>Edge</strong></p>
  
  <p><a href="https://i.stack.imgur.com/Lmj2P.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Lmj2P.png" alt="Pen in edge, showing desired behaviour"></a></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>#wrapper {
    display: flex;
    flex-direction: column;
    height: 15rem;
    background-color: #aaa;
  }
  
  #grid {
    flex-grow: 1;
    display: grid;
    background-color: #ccf;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
    align-content: stretch; /* "end" correctly puts the row to the bottom */
  }
  
  #left {
    background-color: #fcc;
  }
  
  #right {
    background-color: #cfc;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="wrapper"&gt;
    &lt;div id="top"&gt;not in grid&lt;/div&gt;
  
    &lt;div id="grid"&gt;
      &lt;div id="left"&gt;left&lt;/div&gt;
      &lt;div id="right"&gt;right&lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>