Add ErrorConsole UI for Extension Install Warnings

chrome/browser/resources/extensions/extensions.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.
 
 <include src="../uber/uber_utils.js"></include>
 <include src="extension_commands_overlay.js"></include>
 <include src="extension_focus_manager.js"></include>
 <include src="extension_list.js"></include>
 <include src="pack_extension_overlay.js"></include>
+<include src="extension_error_overlay.js"></include>
 
 <if expr="pp_ifdef('chromeos')">
 <include src="chromeos/kiosk_apps.js"></include>
 </if>
 
 // Used for observing function of the backend datasource for this page by
 // tests.
 var webuiResponded = false;
 
 cr.define('extensions', function() {
@@ skipping 93 matching lines @@
       $('pack-extension').addEventListener('click',
           this.handlePackExtension_.bind(this));
       $('update-extensions-now').addEventListener('click',
           this.handleUpdateExtensionNow_.bind(this));
 
       if (!loadTimeData.getBoolean('offStoreInstallEnabled')) {
         this.dragWrapper_ = new cr.ui.DragWrapper(document.documentElement,
                                                   dragWrapperHandler);
       }
 
-      var packExtensionOverlay = extensions.PackExtensionOverlay.getInstance();
-      packExtensionOverlay.initializePage();
+      extensions.PackExtensionOverlay.getInstance().initializePage();
 
       // Hook up the configure commands link to the overlay.
       var link = document.querySelector('.extension-commands-config');
       link.addEventListener('click',
           this.handleExtensionCommandsConfig_.bind(this));
 
       // Initialize the Commands overlay.
-      var extensionCommandsOverlay =
-          extensions.ExtensionCommandsOverlay.getInstance();
-      extensionCommandsOverlay.initializePage();
+      extensions.ExtensionCommandsOverlay.getInstance().initializePage();
+
+      extensions.ExtensionErrorOverlay.getInstance().initializePage();
 
       // Initialize the kiosk overlay.
       if (cr.isChromeOS) {
         var kioskOverlay = extensions.KioskAppsOverlay.getInstance();
         kioskOverlay.initialize();
 
         $('add-kiosk-app').addEventListener('click', function() {
           ExtensionSettings.showOverlay($('kiosk-apps-page'));
           kioskOverlay.didShowPage();
         });
@@ skipping 269 matching lines @@
 
   // Export
   return {
     ExtensionSettings: ExtensionSettings
   };
 });
 
 window.addEventListener('load', function(e) {
   extensions.ExtensionSettings.getInstance().initialize();
 });