chrome/android/features/autofill_assistant/java/res/drawable-night/autofill_assistant_shadow_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2019 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. -->
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners
        android:radius="12dp" />
    <solid
        android:color="@color/modern_secondary_color" />
</shape>