chromium/android_webview/test/shell/res/values/config.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2014 The Chromium Authors
     Use of this source code is governed by a BSD-style license that can be
     found in the LICENSE file.
-->

<resources>
    <!-- Array of "[keySystemName],[UuidOfMediaDrm]" -->
    <string-array name="config_key_system_uuid_mapping" translatable="false">
        <!-- Use Widevine's UUID to pass the availability-test of MediaDRM plugin -->
        <!--suppress TypographyDashes -->
        <item>"x-com.oem.test-keysystem,EDEF8BA9-79D6-4ACE-A3C8-27DCD51D21ED"</item>
        <!--suppress TypographyDashes -->
        <item>"com.oem.test-keysystem,EDEF8BA9-79D6-4ACE-A3C8-27DCD51D21ED"</item>
    </string-array>
</resources>