chrome/android/java/res/layout/radio_button_with_description.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2016 The Chromium Authors. All rights reserved.
     Use of this source code is governed by a BSD-style license that can be
     found in the LICENSE file. -->

<!-- RadioButtonWithDescription extends RelativeLayout -->
<merge xmlns:android="http://schemas.android.com/apk/res/android">

    <RadioButton
        android:id="@+id/radio_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginEnd="16dp"
        android:clickable="false"
        android:focusable="false"
        android:background="@null" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toEndOf="@id/radio_button"
        android:textAppearance="@style/TextAppearance.BlackTitle1" />

    <!-- This TextView is hidden if it has no text, so the initial visibility should be "gone". -->
    <TextView
        android:id="@+id/description"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@id/title"
        android:layout_below="@id/title"
        android:textAppearance="@style/TextAppearance.BlackHint2"
        android:paddingTop="4dp"
        android:visibility="gone" />
</merge>