scrollbar styles taken from the Chrome store

webkit-scrollbar.css

::-webkit-scrollbar,
::-webkit-scrollbar-thumb {
    overflow: visible;
    border-radius: 0;
    border: solid 1px #A6A6A6;
}

::-webkit-scrollbar {
    width: 10px;
    border-right: 0;
    border-top: 0;
    border-bottom: 0;
    background: -webkit-gradient(linear,left top,right top,color-stop(0%,rgba(202, 202, 202, 0.07)),color-stop(100%,rgba(229, 229, 229, 0.07)));
    background: -webkit-linear-gradient(left,rgba(202, 202, 202, 0.07) 0%,rgba(229, 229, 229, 0.07) 100%);
    -webkit-box-shadow: 0 0 1px 0 rgba(0,0,0,.15) inset,0 1px 0 0 #fff;
    box-shadow: 0 0 1px 0 rgba(0,0,0,.15) inset,0 1px 0 0 #fff;
    background-color: rgb(240, 240, 240);
}

::-webkit-scrollbar-thumb {
    background: -webkit-gradient(linear,left top,right top,color-stop(0%,rgba(233, 233, 233, 0.05)),color-stop(100%,rgba(221, 221, 221, 0.05)));
    background: -webkit-linear-gradient(left,rgba(233, 233, 233, 0.05) 0%,rgba(221, 221, 221, 0.05) 100%);
    -webkit-box-shadow: 0 2px 1px 0 rgba(0,0,0,.05);
    box-shadow: 0 2px 1px 0 rgba(0,0,0,.05);
    background-color: #E9E9E9;
}
::-webkit-scrollbar-button {
    height: 0;
    display: block;
    background-color: transparent;
}