[MD History] Make side bar always visible.

chrome/browser/resources/md_history/app.js

 // Copyright 2016 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.
 
 Polymer({
   is: 'history-app',
 
   properties: {
     // The id of the currently selected page.
     selectedPage: {
@@ skipping 74 matching lines @@
     if (info.finished)
       list.disableResultLoading();
   },
 
   /**
    * @param {!Array<!ForeignSession>} sessionList Array of objects describing
    *     the sessions from other devices.
    * @param {boolean} isTabSyncEnabled Is tab sync enabled for this profile?
    */
   setForeignSessions: function(sessionList, isTabSyncEnabled) {
+    if (!isTabSyncEnabled)
+      return;
+
     // TODO(calamity): Add a 'no synced devices' message when sessions are
     // empty.
-    this.$['history-side-bar'].hidden = !isTabSyncEnabled;
     var syncedDeviceElem = this.$['history-synced-device-manager'];
     var syncedDeviceManager =
         /** @type {HistorySyncedDeviceManagerElement} */(syncedDeviceElem);
-    if (isTabSyncEnabled) {
-      syncedDeviceManager.setSyncedHistory(sessionList);
-      /** @type {HistoryToolbarElement} */(this.$.toolbar).hasSidebar = true;
-    }
+    syncedDeviceManager.setSyncedHistory(sessionList);
   },
 
   deleteComplete: function() {
     var historyList = /** @type {HistoryListElement} */(this.$['history-list']);
     var toolbar = /** @type {HistoryToolbarElement} */(this.$.toolbar);
     historyList.removeDeletedHistory(toolbar.count);
     toolbar.count = 0;
   }
 });