For developers that have utilized the in-app WebView component to display HTML content in their Android apps, we have good news: Google just launched a beta channel for said WebView. This means developers can now try out upcoming versions of the WebView and make adjustments to their apps and offer feedback to Google before it goes public — a welcome change from the olden days of having a new WebView behavior dumped on you with a new public release.
It's not that Google didn't want to do this before now; they just couldn't. But the update to Android 5.0 Lollipop made this possible by separating WebView into a separate component that can be updated independently of the Android platform as a whole.
The first beta release of WebView will be based on Chrome 40 browser. Interested developers can check out how to sign up and get involved in testing at the source link below.
Source: Android Developers Blog