chrome/android/java/res/anim/stay_hidden.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2017 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.
-->

<!-- The delay here must be long enough for the Activity being resumed to draw
     its first frame of UI. This is to avoid showing stale 2D screenshots when
     launching Chrome in VR. We cancel this animation upon entering VR. -->
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
        android:interpolator="@android:anim/linear_interpolator"
        android:fromAlpha="0" android:toAlpha="0"
        android:duration="10000" />