history: announce search/time ranges.

chrome/browser/resources/history/history_mobile.css

 /* Copyright (c) 2013 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. */
 
 /* This file contains styles specific to Android and iOS. */
 
 html {
   height: 100%;
 }
 
@@ skipping 64 matching lines @@
   display: block;
   line-height: 1.5;
   margin-top: 16px;
   width: 100%;
 }
 
 html[dir='rtl'] #search-field {
   background-position: right 16px center;
 }
 
-.no-results-message {
-  margin-bottom: 1em;
-  padding-left: 16px;
-  padding-right: 16px;
-}
-
-.search-results .no-results-message {
-  margin-top: 1em;
-}
-
 #notification-bar.alone {
   float: none;
   font-size: 75%;
   margin: 0;
   padding-bottom: 0;
   padding-top: 0;
 }
 
 #remove-selected,
 #search-button,
@@ skipping 185 matching lines @@
   }
 
   #scrolling-container > * {
     margin-left: auto;
     margin-right: auto;
     max-width: 718px;
   }
 
   h1,
   #notification-bar,
-  #loading-spinner,
-  .no-results-message {
+  #loading-spinner {
     padding-left: 0;
     padding-right: 0;
   }
 
 } /* @media only screen and (max-width:720px) */
 
 <if expr="is_ios">
 .ios-keyboard-visible #clear-browsing-data {
   display: none;
 }
 
 .ios-keyboard-visible #scrolling-container {
   /* Should be 0, but that breaks scrolling -- see crbug.com/292715. */
   bottom: -1px;
 }
 </if> /* is_ios */