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%;
+  font-size: 94.4%;
 }
 
 :host ::selection {
   background: rgba(255, 255, 255, 0.3);
 }
 
 #pageselector {
   --paper-input-container-underline: {
     visibility: hidden;
   };
@@ skipping 23 matching lines @@
   padding: 0 3px;
 }
 
 #pagelength-spacer {
   display: inline-block;
   text-align: start;
 }
 
 #slash,
 #pagelength {
   font-size: 81.25%;

[tsergeant, 2016/01/11 04:48:16]

Please decrease this so the size isn't changed by this patch (Current size is
13px)

[Deepak, 2016/01/11 05:24:31]

making 75% corresponds to 12px cuts numbers, 
so making it 68.75% corresponds to 11px, It works in all cases.

[tsergeant, 2016/01/11 23:35:04]

Setting it to 76.5% corresponds to 13px, which works for me in all cases and
doesn't change the size?

 }