chromium/chrome/android/java/res_base/drawable-v26/ic_launcher_round.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2022 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android" >
    <background android:drawable="@mipmap/layered_app_icon_background"/>
    <foreground android:drawable="@mipmap/layered_app_icon_foreground"/>
    <monochrome android:drawable="@drawable/themed_app_icon"/>
</adaptive-icon>