MD History: promote menu button to show clear browsing data in narrow mode

chrome/browser/resources/md_history/browser_service.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.
 
 /**
  * @fileoverview Defines a singleton object, md_history.BrowserService, which
  * provides access to chrome.send APIs.
  */
 
 cr.define('md_history', function() {
@@ skipping 99 matching lines @@
       }
 
       if (successful)
         this.pendingDeletePromise_.resolve(this.pendingDeleteItems_);
       else
         this.pendingDeletePromise_.reject(this.pendingDeleteItems_);
 
       this.pendingDeleteItems_ = null;
       this.pendingDeletePromise_ = null;
     },
+
+    menuPromoShown: function() {
+      chrome.send('menuPromoShown');
+    },
   };
 
   cr.addSingletonGetter(BrowserService);
 
   return {BrowserService: BrowserService};
 });
 
 /**
  * Called by the history backend when deletion was succesful.
  */
 function deleteComplete() {
   md_history.BrowserService.getInstance().resolveDelete_(true);
 }
 
 /**
  * Called by the history backend when the deletion failed.
  */
 function deleteFailed() {
   md_history.BrowserService.getInstance().resolveDelete_(false);
 }