ui/android/java/res/values-v21/styles.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. -->
<resources>
    <!-- Buttons -->
    <style name="ButtonCompat" parent="ButtonCompatBase">
        <item name="android:background">@drawable/button_compat</item>
        <item name="android:fontFamily">sans-serif-medium</item>
    </style>
    <style name="ButtonCompatBorderless" parent="ButtonCompat">
        <item name="android:background">@drawable/button_borderless_compat</item>
    </style>
</resources>