Fix distiller feedback regression

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 57 matching lines @@
 
 td,
 th {
   padding: 0;
 }
 
 /* Base typography. */
 
 html {
   font-size: 14px;
+  height: 100%;
 }
 
 body {
   height: 100%;
   line-height: 1.4;
   text-rendering: optimizeLegibility;
   transition-property: color, background-color;
   transition-duration: 0.5s;
   transition-timing-function: ease;
   overflow-x: hidden;
@@ skipping 724 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);
 }