Show an extension info bubble when a script badge is clicked.

chrome/browser/resources/extensions/extension_info.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('extension_info', function() {
+  'use strict';
+
+  /**
+   * Initialize the info popup.
+   */
+  function load() {
+    $('extension-item').style.backgroundImage =
+        'url(' + loadTimeData.getString('icon') + ')';
+    $('extension-title-running').textContent =
+        loadTimeData.getStringF('isRunning', loadTimeData.getString('name'));
+  }
+
+  return {
+    load: load
+  };
+});
+
+window.addEventListener('DOMContentLoaded', extension_info.load);