Fix style on iOS for distilled content.

components/dom_distiller/core/css/distilledpage.css

 /* Copyright 2014 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. */
 
 /* Set the global 'box-sizing' state to 'border-box'.
  * *::after and *::before used to select pseudo-elements not selectable by *. */
 
 *,
 *::after,
 *::before {
@@ skipping 61 matching lines @@
 }
 
 /* Base typography. */
 
 body,
 html {
   font-size: 14px;
   line-height: 1.4;
   text-rendering: optimizeLegibility;
   overflow-x: hidden;
+  -webkit-overflow-scrolling: touch;
 }
 
 /* Classes for light, dark and sepia themes.
  * Must agree with classes returned by useTheme() in dom_distiller_viewer.js
  * and with CSS class constants in viewer.cc */
 
 .light {
   color: #333;
   background-color: #FFF;
 }
@@ skipping 580 matching lines @@
   border-color: rgb(250,36,36);
 }
 
 #loader.red .circle.red .mask.first .mover {
   background-color: rgb(33,89,189);
 }
 
 #loader.red .circle.red .mask.second .mover {
   background-color: rgb(250,36,36);
 }