chromium/ui/webui/resources/images/check_circle.svg

<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 48 48" fill="#4285F4"><path d="M0 0h48v48H0z" fill="none"/><path d="M24 4C12.95 4 4 12.95 4 24c0 11.04 8.95 20 20 20 11.04 0 20-8.96 20-20 0-11.05-8.96-20-20-20zm-4 30L10 24l2.83-2.83L20 28.34l15.17-15.17L38 16 20 34z"/></svg>