Fix the extension activity log UI.

chrome/browser/resources/extensions/extension_list.js

 // Copyright (c) 2012 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 114 matching lines @@
         var options = node.querySelector('.options-link');
         options.addEventListener('click', function(e) {
           chrome.send('extensionSettingsOptions', [extension.id]);
           e.preventDefault();
         });
         options.hidden = false;
       }
 
       if (extension.allow_activity) {
         var activity = node.querySelector('.activity-link');
-        activity.href = 'chrome://extension-activity?extensionId=' +
-            extension.id;
+        activity.addEventListener('click', function(e) {
+          chrome.send('navigateToUrl', [
+            'chrome://extension-activity?extensionId=' + extension.id,
+            '_blank',
+            e.button,
+            e.altKey,
+            e.ctrlKey,
+            e.metaKey,
+            e.shiftKey
+          ]);
+          e.preventDefault();
+        });
         activity.hidden = false;
       }
 
       // The 'View in Web Store/View Web Site' link.
       if (extension.homepageUrl) {
         var siteLink = node.querySelector('.site-link');
         siteLink.href = extension.homepageUrl;
         siteLink.textContent = loadTimeData.getString(
                 extension.homepageProvided ? 'extensionSettingsVisitWebsite' :
                                              'extensionSettingsVisitWebStore');
@@ skipping 109 matching lines @@
       }
 
       this.appendChild(node);
     },
   };
 
   return {
     ExtensionsList: ExtensionsList
   };
 });