gecko/mobile/android/base/resources/layout/shared_ui_components.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/. -->

<!-- This file is used to include shared UI components in different gecko app
     layouts, such as gecko_app.xml and web_app.xml -->

<merge xmlns:android="http://schemas.android.com/apk/res/android">

    <org.mozilla.gecko.gfx.LayerView android:id="@+id/layer_view"
                                     android:layout_width="fill_parent"
                                     android:layout_height="fill_parent"
                                     android:background="#FFF"/>

    <AbsoluteLayout android:id="@+id/plugin_container"
                    android:background="@android:color/transparent"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"/>

    <org.mozilla.gecko.FormAssistPopup android:id="@+id/form_assist_popup"
                                       android:layout_width="fill_parent"
                                       android:layout_height="fill_parent"
                                       android:visibility="gone"/>

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

</merge>