chrome/android/java/res/drawable/distilled_page_pref_background.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.
-->

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/distilled_page_prefs_unselected" />
    <corners android:radius="2dp" />
</shape>