chromium/chrome/browser/ui/android/appmenu/internal/java/res/drawable/menu_action_bar_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2021 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<org.chromium.components.browser_ui.widget.SurfaceColorDrawable
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:shape="rectangle"
    app:surfaceElevation="@dimen/menu_action_bar_bg_elev">
    <corners
        android:radius="1dp"
        android:topLeftRadius="@dimen/app_menu_corner_size"
        android:topRightRadius="@dimen/app_menu_corner_size"
        android:bottomLeftRadius="0dp"
        android:bottomRightRadius="0dp" />
</org.chromium.components.browser_ui.widget.SurfaceColorDrawable>