Print Preview: Handling pending print to pdf requests.

chrome/browser/resources/print_preview/print_preview.css

 html {
   height: 100%;
 }
 
 body {
   background: white;
   display: -webkit-box;
   height: 100%;
   margin: 0;
   overflow: hidden;
@@ skipping 731 matching lines @@
   80% { top: 3px; }
   90% { top: -2px; }
   95% { top: 1px; }
   100% { top: 0; }
 }
 
 #loading {
   -webkit-margin-end: -3px;
 }
 
-#dancing-dots-text span span {
+.message-with-dots span span {
   -webkit-animation-duration: 1800ms;
   -webkit-animation-iteration-count: infinite;
   -webkit-animation-name: dancing-dots-jump;
   padding: 1px;
   position: relative;
 }
 
-#dancing-dots-text span span:nth-child(2) {
+.message-with-dots span span:nth-child(2) {
   -webkit-animation-delay: 100ms;
 }
 
-#dancing-dots-text span span:nth-child(3) {
+.message-with-dots span span:nth-child(3) {
   -webkit-animation-delay: 300ms;
 }
 
 #two-sided-div {
   margin-top: 10px;
 }
 
 input[disabled] + label {
   color: gray;
 }
 
 #error-action-area {
   margin-top: 10px;
 }