Add a notice about other forms of browsing history to the History WebUI.

chrome/browser/resources/history/history.css

 /* Copyright (c) 2012 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. */
 
 html[dir='rtl'] body.uber-frame > .page {
   -webkit-margin-end: 0;
 }
 
 body.uber-frame > .page.big-topbar-page {
   padding-top: 78px;
@@ skipping 20 matching lines @@
 
 #notification-bar {
   float: right;
   padding-top: 5px;
 }
 
 html[dir='rtl'] #notification-bar {
   float: left;
 }
 
-#notification-bar.alone {
+#top-container.overflow #notification-bar {

[Dan Beam, 2016/04/01 15:32:18]

why did you need to change this?

   float: left;
   margin-top: 12px;
 }
 
-html[dir='rtl'] #notification-bar.alone {
+html[dir='rtl'] #top-container.overflow #notification-bar {
   float: right;
 }
 
+#notification-bar span {
+  display: block;
+}
+
+#notification-bar span + span {
+  margin: 1em 0;
+}
+
 #filter-controls,
 #top-container,
 #results-display,
 #results-pagination {
   max-width: 718px;
 }
 
 #filter-controls {
   display: flex;
   margin-bottom: 4px;
   margin-top: 4px;
 }
 
 #filter-controls > * {
   flex: 1;
 }
 
 #editing-controls {
   -webkit-margin-end: 12px;
   float: left;
 }
 
 html[dir='rtl'] #editing-controls {
   float: right;
 }
 
+#top-container.overflow #editing-controls {
+  float: none;
+}
+
 #editing-controls button:first-of-type {
   -webkit-margin-start: 0;
 }
 
 #range-next,
 #range-previous {
   background-image: url(../disclosure_triangle_small.png),
                     -webkit-linear-gradient(rgb(241, 241, 241),
                                             rgb(241, 241, 241) 38%,
                                             rgb(230, 230, 230));
@@ skipping 534 matching lines @@
 
 #action-menu[data-devicetype='phone']::before {
   background-image: url(../../../../ui/webui/resources/images/smartphone.svg);
   background-position: 14px center;
   padding-left: 43px;
 }
 
 #action-menu[data-devicetype='tablet']::before {
   background-image: url(../../../../ui/webui/resources/images/tablet.svg);
 }