chromium/components/embedder_support/android/java/res/layout/color_picker_advanced_component.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
     Copyright 2013 The Chromium Authors
     Use of this source code is governed by a BSD-style license that can be
     found in the LICENSE file.
-->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/color_picker_gradient_margin"
        android:layout_marginEnd="@dimen/color_picker_gradient_margin"
        android:textAppearance="@android:style/TextAppearance.Medium"
        android:textIsSelectable="false" />

    <FrameLayout
        android:id="@+id/gradient_border"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_below="@id/text"
        android:layout_marginStart="@dimen/color_picker_gradient_margin"
        android:layout_marginEnd="@dimen/color_picker_gradient_margin"
        android:layout_marginTop="3dp"
        android:background="@drawable/color_picker_border"
        android:padding="1dp" >

        <View
            android:id="@+id/gradient"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </FrameLayout>

    <SeekBar
        android:id="@+id/seek_bar"
        android:layout_width="match_parent"
        android:layout_height="75dp"
        android:layout_below="@id/text"
        android:progressDrawable="@android:color/transparent"
        android:thumb="@drawable/color_picker_advanced_select_handle"
        android:translationY="25dp" />

</RelativeLayout>