chrome/android/java/res_download/layout/download_home_toolbar.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. -->

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <!-- This view provides a background for the toolbar when the page's background
         is visible through the lateral margins of the search view -->
    <View
        android:id="@+id/action_bar_bg"
        android:layout_width="match_parent"
        android:layout_height="@dimen/toolbar_height_no_shadow"
        android:background="@color/toolbar_background_primary" />

    <org.chromium.chrome.browser.download.home.toolbar.DownloadHomeToolbar
        android:id="@+id/download_toolbar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/toolbar_height_no_shadow"
        style="@style/ModernToolbar">

        <TextView
            android:id="@+id/title_bar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            style="@style/TextAppearance.BlackHeadline"
            android:text="@string/menu_downloads"/>

    </org.chromium.chrome.browser.download.home.toolbar.DownloadHomeToolbar>

    <org.chromium.chrome.browser.widget.FadingShadowView
        android:id="@+id/shadow"
        android:layout_width="match_parent"
        android:layout_height="@dimen/action_bar_shadow_height"
        android:layout_marginTop="@dimen/toolbar_height_no_shadow"
        android:visibility="gone"/>
</FrameLayout>