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

<level-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:maxLevel="@integer/reload_button_level_reload"
        android:drawable="@drawable/btn_toolbar_reload" />
    <item
        android:maxLevel="@integer/reload_button_level_stop"
        android:drawable="@drawable/btn_close" />
</level-list>