Print Preview: Changing error message when initiator tab closes.

chrome/browser/resources/print_preview.css

 html {
   height: 100%;
 }
 
 body {
   background: white;
   display: -webkit-box;
   height: 100%;
   margin: 0;
   overflow: hidden;
@@ skipping 653 matching lines @@
   position: absolute;
   width: 100%;
 }
 
 #dancing-dots.invisible {
   -webkit-transition: opacity 0.7s linear;
   opacity: 0;
   pointer-events: none;
 }
 
-.messages {
+#messages {
   color: #404040;
   font-size: 15px;
   left: 25%;
   position: relative;
   text-align: center;
   text-shadow: 1px 1px 0 rgba(255, 255, 255, .7);
   top: 50%;
   width: 50%;
 }
 
@@ skipping 31 matching lines @@
   -webkit-animation-delay: 300ms;
 }
 
 #two-sided-div {
   margin-top: 10px;
 }
 
 input[disabled] + label {
   color: gray;
 }