chromium/chrome/browser/ui/android/appmenu/internal/test/java/res/layout/test_app_menu_activity_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.
-->

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_height="match_parent"
    android:layout_width="match_parent" >

    <ImageButton
        android:id="@+id/top_button"
        android:layout_width="48dp"
        android:layout_height="48dp"
        app:srcCompat="@drawable/test_ic_more_vert_black_24dp"
        android:layout_gravity="top|end"
        tools:ignore="ContentDescription" />

    <ImageButton
        android:id="@+id/bottom_button"
        android:layout_width="48dp"
        android:layout_height="48dp"
        app:srcCompat="@drawable/test_ic_more_vert_black_24dp"
        android:layout_gravity="bottom|end"
        tools:ignore="ContentDescription" />

    <View
        android:id="@+id/menu_anchor_stub"
        android:layout_width="0px"
        android:layout_height="0px"
        android:layout_gravity="bottom|start" />
</FrameLayout>