chrome/android/java/res_download/layout/download_location_spinner_dropdown_item.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2018 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. -->

<!-- Note: Nested layouts are used because the styling was being overwritten,
     likely because of the behavior of the Android Spinner class. -->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="@color/modern_primary_color"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/ListItemContainer" >

        <include layout="@layout/modern_list_item_view" />

    </LinearLayout>

</FrameLayout>