Implementation of the Extension Activity Log UI behind a flag.

chrome/browser/resources/options/extension_list.js

 // Copyright (c) 2011 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.
 
 cr.define('options', function() {
   'use strict';
 
   /**
    * A lookup helper function to find the first node that has an id (starting
    * at |node| and going up the parent chain).
@@ skipping 204 matching lines @@
         // Options link (optional).
         if (extension.options_url) {
           var link = this.ownerDocument.createElement('a');
           link.classList.add('extension-links-trailing');
           link.textContent = localStrings.getString('extensionSettingsOptions');
           link.href = '#';
           link.addEventListener('click', this.handleOptions_.bind(this));
           vbox.appendChild(link);
         }
 
+        if (extension.allow_activity) {
+          var link = this.ownerDocument.createElement('a');
+          link.classList.add('extension-links-trailing');
+          link.textContent =
+              localStrings.getString('extensionSettingsActivity');
+          link.href = 'chrome://extension-activity?extensionId=' + extension.id;
+          vbox.appendChild(link);
+        }
+
         // Then the optional Visit Website link.
         if (extension.homepageUrl) {
           var link = this.ownerDocument.createElement('a');
           link.classList.add('extension-links-trailing');
           link.textContent =
               localStrings.getString('extensionSettingsVisitWebsite');
           link.href = extension.homepageUrl;
           vbox.appendChild(link);
         }
 
@@ skipping 520 matching lines @@
           ]);
         }
       }
     },
   };
 
   return {
     ExtensionsList: ExtensionsList
   };
 });