chrome/android/touchless/java/res/drawable/dialog_rounded_top.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">

    <solid
        android:color="@color/modern_primary_color" />

    <corners
        android:radius="1dp"
        android:topLeftRadius="@dimen/default_rounded_corner_radius"
        android:topRightRadius="@dimen/default_rounded_corner_radius"
        android:bottomLeftRadius="0dp"
        android:bottomRightRadius="0dp" />
</shape>