Implement support for <extensionoptions> embedding in WebUI

chrome/test/data/extensions/webui/can_embed_extension_options.js

Index: chrome/test/data/extensions/webui/can_embed_extension_options.js
diff --git a/chrome/test/data/extensions/webui/can_embed_extension_options.js b/chrome/test/data/extensions/webui/can_embed_extension_options.js
new file mode 100644
index 0000000000000000000000000000000000000000..57f538dee8048bb0b3dca35b9a1719799fe6d1e6
--- /dev/null
+++ b/chrome/test/data/extensions/webui/can_embed_extension_options.js
@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// out/Debug/browser_tests
+//     --gtest_filter=ExtensionWebUITest.CanEmbedExtensionOptions
+if (!chrome || !chrome.test || !chrome.test.sendMessage) {
+  console.error('chrome.test.sendMessage is unavailable on ' +
+                document.location.href);
+  domAutomationController.send(false);
+  return;
+}
+
+chrome.test.sendMessage('ready', function(reply) {
+  var extensionoptions = document.createElement('extensionoptions');
+  extensionoptions.addEventListener('load', function() {
+    chrome.test.sendMessage('guest loaded');
+  });
+  extensionoptions.setAttribute('extension', reply);
+  document.body.appendChild(extensionoptions);
+});
+
+domAutomationController.send(true);