MD History: Show sidebar next to content on wide screens

chrome/browser/resources/md_history/history_toolbar.js

 // Copyright 2015 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-toolbar',
   properties: {
     // Number of history items currently selected.
     count: {
       type: Number,
@@ skipping 16 matching lines @@
       notify: true,
     },
 
     // True if the backend is processing and a spinner should be shown in the
     // toolbar.
     spinnerActive: {
       type: Boolean,
       value: false
     },
 
+    hasDrawer: {
+      type: Boolean,
+      observer: 'hasDrawerChanged_',
+      reflectToAttribute: true,
+    },
+
     // Whether domain-grouped history is enabled.
     isGroupedMode: {
       type: Boolean,
       reflectToAttribute: true,
     },
 
     // The period to search over. Matches BrowsingHistoryHandler::Range.
     groupedRange: {
       type: Number,
       value: 0,
@@ skipping 68 matching lines @@
   },
 
   numberOfItemsSelected_: function(count) {
     return count > 0 ? loadTimeData.getStringF('itemsSelected', count) : '';
   },
 
   getHistoryInterval_: function(queryStartTime, queryEndTime) {
     // TODO(calamity): Fix the format of these dates.
     return loadTimeData.getStringF(
       'historyInterval', queryStartTime, queryEndTime);
-  }
+  },
+
+  /** @private */
+  hasDrawerChanged_: function() {
+    this.updateStyles();
+  },
 });