chromium/components/browser_ui/widget/android/java/res/drawable/tile_view_highlight.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2015 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<ripple xmlns:android="http://schemas.android.com/apk/res/android"
  android:color="@color/color_on_surface_with_alpha_10">
  <item
    android:id="@android:id/mask"
    android:drawable="@drawable/tile_view_highlight_mask" />
</ripple>