Google Chrome user style for Gnome 3.4 overlay scrollbars

Custom.css

html::-webkit-scrollbar {
    background-color:#d6d6d6;
}
html::-webkit-scrollbar {
    width:13px;
    height:13px;
}
html::-webkit-scrollbar-button {
    display:none;
}
html::-webkit-scrollbar-thumb {
    background: #9b9d9e;
    border-radius: 3ex;
    border: 3px solid #d6d6d6;
}
html::-webkit-scrollbar-thumb:hover {
    background: #828586;
}
html::-webkit-scrollbar-thumb:active {
    background: #4a90d9;
}