chromium/chrome/android/java/res/layout/tab_switcher_action_menu_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2019 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<ListView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tab_group_action_menu_list"
    android:paddingTop="8dp"
    android:paddingBottom="8dp"
    android:divider="@android:color/transparent"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />