chromium/chrome/browser/feed/android/java/res/drawable/header_title_section_tab_background.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2022 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<selector xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
  <item android:state_enabled="true">
    <org.chromium.components.browser_ui.widget.SurfaceColorDrawable
        android:shape="rectangle"
        app:surfaceElevation="@dimen/feed_header_section_tab_bg_elevation_enabled">
      <corners android:radius="@dimen/feed_header_background_corner_radius_feed_containment"/>
    </org.chromium.components.browser_ui.widget.SurfaceColorDrawable>
  </item>
</selector>