components/browser_ui/widget/android/java/res/drawable/async_image_view_waiting.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2018 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. -->
     
<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:aapt="http://schemas.android.com/aapt"
    tools:targetApi="21"
    android:drawable="@drawable/async_image_view_unavailable">

    <target android:name="circle">
        <aapt:attr name="android:animation">
            <set android:ordering="sequentially">
                <objectAnimator
                    android:startOffset="0"
                    android:duration="450"
                    android:interpolator="@android:interpolator/fast_out_slow_in"
                    android:propertyName="fillAlpha"
                    android:valueFrom="1"
                    android:valueTo="0.5"
                    android:valueType="floatType"/>
                <objectAnimator
                    android:startOffset="0"
                    android:duration="833"
                    android:interpolator="@android:interpolator/fast_out_slow_in"
                    android:propertyName="fillAlpha"
                    android:valueFrom="0.5"
                    android:valueTo="1"
                    android:valueType="floatType"/>
            </set>
        </aapt:attr>
    </target>

    <target android:name="square">
        <aapt:attr name="android:animation">
            <set android:ordering="sequentially">
                <objectAnimator
                    android:startOffset="83"
                    android:duration="767"
                    android:interpolator="@android:interpolator/fast_out_slow_in"
                    android:propertyName="fillAlpha"
                    android:valueFrom="1"
                    android:valueTo="0.5"
                    android:valueType="floatType"/>
                <objectAnimator
                    android:duration="517"
                    android:startOffset="0"
                    android:interpolator="@android:interpolator/fast_out_slow_in"
                    android:propertyName="fillAlpha"
                    android:valueFrom="0.5"
                    android:valueTo="1"
                    android:valueType="floatType"/>
            </set>
        </aapt:attr>
    </target>

    <target android:name="arc">
        <aapt:attr name="android:animation">
            <set android:ordering="sequentially">
                <objectAnimator
                    android:startOffset="150"
                    android:duration="417"
                    android:interpolator="@android:interpolator/fast_out_slow_in"
                    android:propertyName="fillAlpha"
                    android:valueFrom="0"
                    android:valueTo="0.3"
                    android:valueType="floatType"/>
                <objectAnimator
                    android:startOffset="0"
                    android:duration="933"
                    android:interpolator="@android:interpolator/fast_out_slow_in"
                    android:propertyName="fillAlpha"
                    android:valueFrom="0.3"
                    android:valueTo="0"
                    android:valueType="floatType"/>
            </set>
        </aapt:attr>
    </target>

</animated-vector>