chrome/android/java/res/xml/homepage_preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2015 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. -->

<PreferenceScreen
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <org.chromium.components.browser_ui.settings.ChromeSwitchPreference
        android:key="homepage_switch"
        android:summaryOn="@string/text_on"
        android:summaryOff="@string/text_off" />

    <org.chromium.chrome.browser.homepage.settings.RadioButtonGroupHomepagePreference
        android:key="homepage_radio_group"
        android:selectable="false"
        app:allowDividerAbove="true"
        app:allowDividerBelow="false" />
</PreferenceScreen>