chromium/components/browser_ui/widget/android/java/res/anim/chip_out.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2020 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_shortAnimTime"
    android:interpolator="@android:anim/linear_interpolator" >

    <alpha
        android:fromAlpha="1.0"
        android:toAlpha="0" />

</set>