MD History: Display synced tabs history.

chrome/browser/resources/md_history/history_list.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_shared_menu/cr_shared_menu.html">
 <link rel="import" href="chrome://history/constants.html">
 <link rel="import" href="chrome://history/history_item.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-list">
   <template>
     <style include="shared-style"></style>
     <style>
       :host {
         display: flex;
         flex-direction: column;
       }
 
       #infinite-list {
         flex: 1;
-        padding: 20px 0 0 0;
+        padding-top: var(--first-card-padding-top);
       }
 
       paper-item {
         -webkit-user-select: none;
         cursor: pointer;
         font: inherit;
       }
 
       paper-item:hover {
         background: #eaeaea;
@@ skipping 26 matching lines @@
     <cr-shared-menu id="sharedMenu">
       <paper-item i18n-content="moreFromSite" on-tap="onMoreFromSiteTap_">
       </paper-item>
       <paper-item i18n-content="removeFromHistory"
           on-tap="onRemoveFromHistoryTap_">
       </paper-item>
     </cr-shared-menu>
   </template>
   <script src="chrome://history/history_list.js"></script>
 </dom-module>