how to override font boosting in mobile chrome

Try text-size-adjust:

html {
    text-size-adjust: none;
    -ms-text-size-adjust: none;
    -webkit-text-size-adjust: none;
    -moz-text-size-adjust: none;
}

adding following line to my reset.css worked for me

    html * {max-height:1000000px;}

There is no real possibility for disabling font boosting. There may be some hacks, but they are meant for something different and, in fact, do something different.