Botão "Iniciar Sessao" igual ao Google+

<html>
<head>
<style type="text/css">
#caixa {
    font-size: 12px;
    background-color: #dd4b39;
    -webkit-border-radius: 3px;
    border-radius: 3px;
    display: inline-block;
}
#gicon {
    background: no-repeat url(//ssl.gstatic.com/s2/oz/images/sprites/signinbutton-094c03c836f9f91d08b943a90778d34e.png) -32px -44px;
    height: 32px;
    width: 32px;
    display: inline-block;
    vertical-align: top;
}
#gtext {
    padding: 0 20px;
    display: inline-block;
    font-weight: bold;
    font-size: 12px;
    line-height: 31px;
    color: #fff;
    -webkit-font-smoothing: antialiased;
    font-family: Roboto,arial,sans-serif;
    white-space: nowrap;
    border-left: 1px solid #bb3f30;
}
</style>
</head>
<body>
<div id='caixa'>
    <div id='gicon'></div>
    <div id='gtext'>Iniciar Sessao</div>
</div>
</body>
</html>