Add a footer about other forms of history to the MD history page.

chrome/browser/resources/md_history/side_bar.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-listbox/paper-listbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-ripple/paper-ripple.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/color.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-side-bar">
   <template>
     <style include="shared-style">
       :host {
         display: block;
+        height: 100%;
         padding-top: 5px;
         width: var(--side-bar-width);
       }
 
       div.separator {
         background-color: rgba(0, 0, 0, 0.08);
         height: 1px;
         margin: 8px 0;
       }
 
       #clear-browsing-data {
         text-transform: uppercase;
       }
 
       paper-item {
-        -webkit-padding-start: 25px;
+        -webkit-padding-start: 24px;

[msramek, 2016/06/23 13:34:07]

I think this should be 24px, since:

1. It's in the spec:
https://folio.googleplex.com/chrome-ux-specs-and-sources/Chrome%20Inner%20Pag...

2. The "History" header also uses 24px.

3. It's an anomaly ("-webkit-padding-start: 24px" has more hits in code search
than "-webkit-padding-start: 25px").

         cursor: pointer;
         font-size: 14px;
         font-weight: 500;
       }
 
       paper-item.iron-selected {
         color: var(--google-blue-500);
         font-weight: 500;
       }
 
       paper-listbox {
         -webkit-user-select: none;
         background-color: transparent;
         color: #5a5a5a;
       }
+
+      #footer {
+        bottom: 0;
+        color: var(--paper-grey-600);
+        font-size: 14px;
+        font-weight: 400;
+        position: absolute;
+        width: var(--side-bar-width);
+      }
+
+      #footer-text {
+        -webkit-padding-end: 16px;
+        -webkit-padding-start: 24px;
+        margin: 24px 0;
+      }
+
+      #footer a {
+        color: var(--google-blue-700);
+        text-decoration: none;
+      }
     </style>
     <paper-listbox id="overflow-menu" selected="0" on-iron-select="onSelect_"
         selectable=".page-item">
       <paper-item view-id="history-list" class="page-item">
         <div>$i18n{historyMenuItem}</div>
         <paper-ripple></paper-ripple>
       </paper-item>
       <paper-item view-id="history-synced-device-manager" class="page-item">
         <div>$i18n{openTabsMenuItem}</div>
         <paper-ripple></paper-ripple>
       </paper-item>
       <div class="separator"></div>
       <paper-item on-tap="onClearBrowsingDataTap_" id="clear-browsing-data">
         <div>$i18n{clearBrowsingData}</div>
         <paper-ripple></paper-ripple>
       </paper-item>
+      <div id="footer" hidden="[[!showFooter]]">
+        <div class="separator"></div>
+        <div id="footer-text">$i18nRaw{footer}</div>
+      </div>
     </paper-listbox>
   </template>
   <script src="chrome://history/side_bar.js"></script>
 </dom-module>