chromium/chrome/browser/tab_ui/android/java/res/drawable/ic_group_icon_16dp.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2020 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="16dp"
    android:height="16dp"
    android:viewportWidth="16.0"
    android:viewportHeight="16.0"
    android:tint="@macro/default_icon_color">
    <path
        android:fillColor="@android:color/white"
        android:pathData="
        M6,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z
        M6,14c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z
        M12,14c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z
        M12,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z"/>

</vector>