Add bookmark promo to NTP on first run.

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;
@@ skipping 263 matching lines @@
 #tip-line.hidden,
 .notification-shown #tip-line {
   opacity: 0;
   pointer-events: none;
 }
 
 #tip-line a,
 #tip-line button {
   /* We do not want a trailing single word from a link on the last line */
   white-space: nowrap;
+  padding: 0;
 }
 
 #option-button {
   -webkit-appearance: none;
   background-color: transparent;
   width: 19px;
   height: 17px;
   margin: 0;
   border: 0;
   padding: 0;
@@ skipping 195 matching lines @@
 #footer hr {
   border: 0;
   display: inline;
   margin: 0;
   padding: 0;
 }
 
 #footer hr:after {
   content: "|";
 }