chrome/android/java/res/layout/payment_request_editor.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2016 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. -->

<!-- PaymentRequestUI editor dialog. -->
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/editor_container"
    android:background="@color/modern_primary_color">

    <!-- Toolbar -->
    <org.chromium.chrome.browser.autofill.prefeditor.EditorDialogToolbar
        android:id="@+id/action_bar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true" />

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

    <!-- All the page content in scrollable form. -->
    <org.chromium.components.browser_ui.widget.FadingEdgeScrollView
        android:id="@+id/scroll_view"
        android:layout_height="0dp"
        android:layout_width="match_parent"
        android:layout_below="@id/action_bar"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true" >

        <LinearLayout
            android:id="@+id/contents"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingStart="@dimen/pref_autofill_content_spacing"
            android:paddingEnd="@dimen/pref_autofill_content_spacing"
            android:orientation="vertical" />

    </org.chromium.components.browser_ui.widget.FadingEdgeScrollView>

</RelativeLayout>