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chromium/android_webview/java/res/values/styles.xml 

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2024 The Chromium Authors
     Use of this source code is governed by a BSD-style license that can be
     found in the LICENSE file. -->

<resources>
  <style name="WebViewBaseTheme" parent="Theme.AppCompat.DayNight"></style>
</resources>