chromium/components/browser_ui/modaldialog/android/java/res/layout/modal_dialog_container.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2017 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:ignore="UnusedResources"
    android:importantForAccessibility="no"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <View
        android:id="@+id/scrim"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/modal_dialog_scrim_color" />

</FrameLayout>