Implement autosizing for <extensionoptions>

chrome/test/data/extensions/api_test/extension_options/embed_self/test.js

 // 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.
 
 function optionsPageLoaded() {
   var hasLoaded = false;
   chrome.extension.getViews().forEach(function(view) {
     if (view.document.location.pathname == '/options.html') {
       chrome.test.assertEq(false, hasLoaded);
       hasLoaded = view.loaded;
@@ skipping 92 matching lines @@
 
       if (onStorageChanged && onSetAndGet) {
         document.body.removeChild(extensionoptions);
         done();
       }
     });
 
     var extensionoptions = document.createElement('extensionoptions');
     extensionoptions.setAttribute('extension', chrome.runtime.id);
     document.body.appendChild(extensionoptions);
+  },
+
+  function autosizedGuestIsWithinSizeConstraints() {
+    var done = chrome.test.callbackAdded();
+
+    var extensionoptions = new ExtensionOptions();
+    extensionoptions.extension = chrome.runtime.id;
+    extensionoptions.autosize = 'on';
+    extensionoptions.minheight = 499;
+    extensionoptions.minwidth = 499;
+    extensionoptions.maxheight = 501;
+    extensionoptions.maxwidth = 501;
+
+    extensionoptions.onsizechanged = function(evt) {
+      try {
+        chrome.test.assertTrue(evt.width >= 499);
+        chrome.test.assertTrue(evt.height >= 499);
+        chrome.test.assertTrue(evt.width <= 501);
+        chrome.test.assertTrue(evt.height <= 501);
+        done();
+      } finally {
+        document.body.removeChild(extensionoptions);
+      }
+    };
+
+    document.body.appendChild(extensionoptions);
   }
 ]);