chromium/ui/file_manager/file_manager/foreground/elements/xf_circular_progress.html

<style>
  .progress {
    height: 36px;
    width: 36px;
  }

  :host-context([detailed-panel][data-category='expanded'])
  .progress {
    height: 32px;
    width: 32px;
   }

  :host-context([detailed-panel][data-category='collapsed'])
  .progress {
    height: 28px;
    width: 28px;
  }

  .bottom {
    fill: none;
    stroke: var(--cros-sys-highlight_shape);
  }
  .top {
    fill: none;
    stroke: var(--cros-sys-primary);
    stroke-linecap: round;
  }
  text {
    fill: var(--cros-sys-primary);
    font: var(--cros-button-1-font);
  }
  .errormark {
    fill: var(--cros-sys-error);
  }
</style>
<div class='progress'>
  <svg xmlns='http://www.w3.org/2000/svg'
    viewBox='0 0 36 36'>
    <g id='circles' stroke-width='3'>
      <circle class='bottom' cx='18' cy='18' r='10'></circle>
      <circle class='top' transform='rotate(-90 18 18)'
      cx='18' cy='18' r='10' stroke-dasharray='0 1'></circle>
    </g>
    <text class='label' x='18' y='18' text-anchor='middle'
      alignment-baseline='central'></text>
    <circle class='errormark' visibility='hidden'
      cx='25.5' cy='10.5' r='4' stroke='none'></circle>
  </svg>
</div>