Add instant to tabbed options.

chrome/browser/resources/new_new_tab.css

 html {
   /* This is needed because of chrome://theme/css/new_tab.css */
   height: 100%;
 }
 
 body {
   margin: 0;
   height: 100%;
   overflow: auto;
   -webkit-user-select: none;
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   border: 1px solid rgb(118, 118, 118);
   border-radius: 3px;
   padding: 0 3px;
   background: -webkit-gradient(linear, left top, left bottom,
                                from(white),
                                to(rgb(228, 229, 240)));
   width: auto;
   max-width: 300px;
 }
 
-.hbox {
-  display: -webkit-box;
-  -webkit-box-orient: horizontal;
-}
-
 .foreign-session-client {
   float: left;
   max-width: 114px; /* Selected so that we can fit 5 items in EN-US */
   font-weight: normal;
   margin: 0;
   position: relative;
 }
 
 html[dir=rtl] .foreign-session-client {
   float: right;
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   }
 }
 
 /* Ensure we have at least 10px horizontal marging. */
 @media (max-width: 712px) {
   #main {
     margin-left: 10px;
     margin-right: 10px;
   }
 }