chromium/chrome/android/features/keyboard_accessory/javatests/res/layout/test_main.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. -->

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
        <org.chromium.ui.AsyncViewStub
            android:id="@+id/keyboard_accessory_stub"
            android:inflatedId="@+id/keyboard_accessory"
            android:layout_height="@dimen/keyboard_accessory_height_with_shadow"
            android:layout_width="match_parent"
            android:layout_gravity="start|bottom"/>

        <org.chromium.ui.AsyncViewStub
            android:id="@+id/keyboard_accessory_sheet_stub"
            android:inflatedId="@+id/keyboard_accessory_sheet_container"
            android:layout_height="@dimen/keyboard_accessory_sheet_height"
            android:layout_width="match_parent"
            android:layout_gravity="start|bottom"/>
</FrameLayout>