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

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2014 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. -->

<!-- Layout for a preference with a title and a custom view below the title. -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    style="@style/PreferenceLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="vertical">

    <TextView
        android:id="@android:id/title"
        style="@style/PreferenceTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <FrameLayout
        android:id="@android:id/widget_frame"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>