Delete old chromedriver code, and remove mongoose webserver.

chrome/test/webdriver/test/app_shell_extension/bg.js

Index: chrome/test/webdriver/test/app_shell_extension/bg.js
diff --git a/chrome/test/webdriver/test/app_shell_extension/bg.js b/chrome/test/webdriver/test/app_shell_extension/bg.js
deleted file mode 100644
index 4fdf0e2fec00e4d068017b26efa3061465e6641c..0000000000000000000000000000000000000000
--- a/chrome/test/webdriver/test/app_shell_extension/bg.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// 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.
-
-chrome.app.runtime.onLaunched.addListener(function(data) {
-  chrome.app.window.create('view_checks.html', {
-    frame: 'chrome',
-    width: 1024,
-    height: 768,
-    minWidth: 1024,
-    minHeight: 768
-  });
-});