setCloseButtonIcon() method doesn't change default Close button : <p>I try to change default icon for Close Button in Chrome custom tabs (CustomTabsIntent.Builder)</p>

<p>Simple code for testing:</p>

<pre><code>Bitmap closeIcon = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
intentBuilder.setCloseButtonIcon(closeIcon);
</code></pre>

<p>But nothing happens. Why? (Nexus 7, Marshmallow)</p>
