Crosswalk project integration with Unity (Android); Viable?

We have a requirement in which we're trying to play an HTML5 minigame in a WebView inside the Unity app. We were using UniWebView for this up until now and it was working fine for the most part. But for some primitive browsers in the older Android devices (Ex. Android OS 4.1 to 5.0) the browser does not support HTML5. I understand that this is an issue with the native browser as UniWebView uses the native WebView to display the web page. We worked around this issue by opening the link with Application.OpenURL(). But our client does not want this behaviour.

As a possible solution, our client suggested that we use the Crosswalk project for running the HTML5 mini game.

After looking into this, we found that there is no documentation that allows us to do this in a straight forward method. Is there a way in which we can accomplish this? If so, is it a good enough solution? Any help regarding this will be much appreciated.

 

We are also having trouble opening a webview from unity that will support WebGL, any info on opening the crosswalk webview will be appreciated