gecko-dev/mobile/android/base/resources/layout/notification_progress.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:orientation="vertical"
              android:paddingTop="7dp"
              android:paddingLeft="5dp">

    <LinearLayout android:layout_width="fill_parent"
                  android:layout_height="wrap_content"
                  android:orientation="horizontal">

        <ImageView android:id="@+id/notification_image"
                   android:layout_width="25dp"
                   android:layout_height="25dp"
                   android:scaleType="fitCenter"/>

        <TextView android:id="@+id/notification_title"
                  android:textAppearance="@android:style/TextAppearance.StatusBar.EventContent.Title"
                  android:layout_width="fill_parent"
                  android:layout_height="wrap_content"
                  android:layout_weight="1"
                  android:singleLine="true"
                  android:ellipsize="marquee"
                  android:fadingEdge="horizontal"
                  android:paddingLeft="10dp"/>

    </LinearLayout>

    <LinearLayout android:layout_width="fill_parent"
                  android:layout_height="wrap_content"
                  android:orientation="horizontal">
        <TextView android:id="@+id/notification_text"
                  android:textAppearance="@android:style/TextAppearance.StatusBar.EventContent"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:paddingLeft="3dp"/>
        <ProgressBar android:id="@+id/notification_progressbar"
                     style="?android:attr/progressBarStyleHorizontal"
                     android:layout_width="fill_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="1dip"
                     android:layout_marginBottom="1dip"
                     android:layout_marginLeft="4dip"
                     android:layout_marginRight="10dip"
                     android:layout_centerHorizontal="true"/>
    </LinearLayout>

</LinearLayout>