detect android stock browser. Adds class "is-android-stock-browser" to the html element. You will need this only in rare cases. For example: text-rendering bug with webfonts in Android 4.x.

detect-android-stock-browser.js

(function(){

    /*
    Use this only if really really necessary.
    This plugin tries to detect android stock browser.

    Place it in the head tag. And after Modernizr.

    https://developer.chrome.com/multidevice/user-agent#webview_user_agent
     */

    var ua = navigator.userAgent,
        reg = /(Version\/\d\.\d)/i;

    if(ua.indexOf('Android') > -1 && ua.match(reg) !== null){

        // you're most likely on a android stock browser
        document.documentElement.className += ' is-android-stock-browser';
    }
})();