chromium/ui/android/java/res/drawable/drag_shadow_background.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2022 The Chromium Authors
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">
    <stroke
        android:width="@dimen/drag_shadow_border_size"
        android:color="@color/baseline_neutral_variant_90_alpha_20"/>
    <corners
        android:topLeftRadius="@dimen/drag_shadow_border_corner_radius"
        android:topRightRadius="@dimen/drag_shadow_border_corner_radius"
        android:bottomLeftRadius="@dimen/drag_shadow_border_corner_radius"
        android:bottomRightRadius="@dimen/drag_shadow_border_corner_radius"/>
</shape>