Fix for overlapping of cursor with page number in page selector.

chrome/browser/resources/pdf/elements/viewer-page-selector/viewer-page-selector.css

 /* Copyright 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 :host {
   color: #fff;
   font-size: 88.8%;
 }
 
 :host ::selection {
@@ skipping 10 matching lines @@
   display: inline-block;
   padding: 0;
   width: 1ch;
 }
 
 #input {
   -webkit-margin-start: -3px;
   color: #fff;
   line-height: 18px;
   padding: 3px;
-  text-align: end;
+  text-align: center;

[tsergeant, 2016/01/06 01:58:59]

Again, changing the alignment is something we want to avoid

[Deepak, 2016/01/06 07:35:35]

Done.

 }
 
 #input:focus,
 #input:hover {
   background-color: rgba(0, 0, 0, 0.5);
   border-radius: 2px;
 }
 
 #slash {
   padding: 0 3px;
 }
 
 #pagelength-spacer {
   display: inline-block;
   text-align: start;
 }
 
 #slash,
 #pagelength {
   font-size: 81.25%;
 }