chromium/ui/webui/resources/cr_components/help_bubble/help_bubble_icons.html

<cr-iconset name="iph" size="24">
  <svg>
    <defs>
      <!--
      These icons are copied from Material UI and optimized through SVGOMG
      See http://goo.gl/Y1OdAq for instructions on adding additional icons.
      -->
      <g id="celebration">
        <path fill="none" d="M0 0h20v20H0z"></path>
        <path fill-rule="evenodd"
          d="m2 22 14-5-9-9-5 14Zm10.35-5.82L5.3 18.7l2.52-7.05 4.53 4.53ZM14.53 12.53l5.59-5.59a1.25 1.25 0 0 1 1.77 0l.59.59 1.06-1.06-.59-.59a2.758 2.758 0 0 0-3.89 0l-5.59 5.59 1.06 1.06ZM10.06 6.88l-.59.59 1.06 1.06.59-.59a2.758 2.758 0 0 0 0-3.89l-.59-.59-1.06 1.07.59.59c.48.48.48 1.28 0 1.76ZM17.06 11.88l-1.59 1.59 1.06 1.06 1.59-1.59a1.25 1.25 0 0 1 1.77 0l1.61 1.61 1.06-1.06-1.61-1.61a2.758 2.758 0 0 0-3.89 0ZM15.06 5.88l-3.59 3.59 1.06 1.06 3.59-3.59a2.758 2.758 0 0 0 0-3.89l-1.59-1.59-1.06 1.06 1.59 1.59c.48.49.48 1.29 0 1.77Z">
        </path>
      </g>
      <g id="lightbulb_outline">
        <path fill="none" d="M0 0h24v24H0z"></path>
        <path
          d="M9 21c0 .55.45 1 1 1h4c.55 0 1-.45 1-1v-1H9v1zm3-19C8.14 2 5 5.14 5 9c0 2.38 1.19 4.47 3 5.74V17c0 .55.45 1 1 1h6c.55 0 1-.45 1-1v-2.26c1.81-1.27 3-3.36 3-5.74 0-3.86-3.14-7-7-7zm2 11.7V16h-4v-2.3C8.48 12.63 7 11.53 7 9c0-2.76 2.24-5 5-5s5 2.24 5 5c0 2.49-1.51 3.65-3 4.7z">
        </path>
      </g>
      <g id="lightbulb_outline_chrome_refresh" width="20" height="20" viewBox="0 -960 960 960">
        <path
          d="M479.779-81.413q-30.975 0-52.812-22.704-21.837-22.704-21.837-55.035h149.74q0 32.631-22.058 55.185-22.058 22.554-53.033 22.554ZM333.848-209.065v-75.587h292.304v75.587H333.848Zm-15-125.5Q254.696-374 219.282-440.533q-35.413-66.532-35.413-142.163 0-123.288 86.364-209.59 86.363-86.301 209.739-86.301t209.767 86.301q86.392 86.302 86.392 209.59 0 75.87-35.413 142.283Q705.304-374 641.152-334.565H318.848Zm26.348-83h269.608q37.283-30.522 57.805-73.566 20.521-43.043 20.521-91.512 0-89.424-61.812-151.184-61.813-61.76-151.087-61.76-89.274 0-151.318 61.76-62.043 61.76-62.043 151.184 0 48.469 20.521 91.512 20.522 43.044 57.805 73.566Zm134.804 0Z">
        </path>
      </g>
    </defs>
  </svg>
</cr-iconset>