<!-- contribution: 200px
      starts as max(specified=200, min-content=100) = 200
      auto min size is 100, so has no effect
      -->
      <div style="flex: 1 0 50px; width: 200px;">
        <div></div>
      </div>
      <!-- contribution: 150px
      starts as max(specified=50, min-content=100) = 100
      clamped up to 150 because doesn't shrink
      auto min size is 50, so has no effect
      -->
      <div style="flex: 2 0 150px; width: 50px;">
        <div></div>
      </div>
    </div>
  </div>