MD History: Display synced tabs history.

chrome/browser/resources/md_history/history_toolbar.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_search_field/cr_search_field.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-toolbar">
   <template>
     <style include="shared-style"></style>
@@ skipping 64 matching lines @@
       }
 
       #back-padding {
         flex: 1 1 0;
       }
 
       [hidden] {
         display: none !important;
       }
     </style>
-
     <div id="toolbar-container">
       <div id="main-content" hidden$="{{itemsSelected_}}">
         <h1 i18n-content="title" id="title"></h1>
         <cr-search-field id="search-input"
             i18n-values="label:search;clear-label:clearSearch">
         </cr-search-field>
       </div>
 
       <div id="items" hidden$="{{!itemsSelected_}}">
         <paper-icon-button icon="clear" id="cancel-icon-button"
@@ skipping 12 matching lines @@
         <paper-button on-tap="onClearBrowsingDataTap_"
             i18n-content="clearBrowsingData"
             id="clear-browsing-data-button">
         </paper-button>
       </div>
       <div id="back-padding"></div>
     </div>
   </template>
   <script src="chrome://history/history_toolbar.js"></script>
 </dom-module>