chrome/android/java/res/layout/payment_request_spinny.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. -->

<!-- Indeterminate spinny used to show that things are being loaded in the PaymentRequestUi.
     Margins in this file are assigned so that it can be either included or inflated and have
     the correct margins for the situation.  When included in the main bottom sheet, the
     FrameLayout's margins are applied, but they are ignored when this is inflated without
     a parent.
-->
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:ignore="MergeRootFrame"
    android:id="@+id/payment_request_spinny"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="@dimen/editor_dialog_section_large_spacing" >

    <!-- Indeterminate spinny to show that things are processing. -->
    <ProgressBar
        android:id="@+id/waiting_progress"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_marginTop="28dp"
        android:layout_gravity="center_horizontal|top" />

    <!-- Message displayed to the user.
         The top margin is computed assuming there's a 28dp margin above and below the progress bar,
         which is itself 24dp tall (28 + 28 + 24 = 80).
    -->
    <TextView
        android:id="@+id/message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="80dp"
        android:layout_marginStart="@dimen/editor_dialog_section_large_spacing"
        android:layout_marginEnd="@dimen/editor_dialog_section_large_spacing"
        android:layout_marginBottom="@dimen/editor_dialog_section_large_spacing"
        android:gravity="center_horizontal"
        android:textAppearance="@style/TextAppearance.TextLarge.Secondary" />

</FrameLayout>