chromium/chrome/android/java/res/xml/search_widget_info.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2017 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<!-- This widget automatically updates once per day, and whenever Chrome starts up. -->
<appwidget-provider
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:minWidth="240dp"
    android:minHeight="48dp"
    android:initialLayout="@layout/search_widget_template"
    android:previewLayout="@layout/search_widget_template"
    android:previewImage="@drawable/widget_preview"
    android:resizeMode="horizontal"
    android:updatePeriodMillis="86400000"
    android:widgetCategory="home_screen|searchbox" />