Improve <adview> implementation and add tests.

chrome/test/data/extensions/platform_apps/ad_view/loadabort_event/chrometest.js

Index: chrome/test/data/extensions/platform_apps/ad_view/loadabort_event/chrometest.js
diff --git a/chrome/test/data/extensions/platform_apps/ad_view/loadabort_event/chrometest.js b/chrome/test/data/extensions/platform_apps/ad_view/loadabort_event/chrometest.js
new file mode 100644
index 0000000000000000000000000000000000000000..afb362daff0841a582699aefde5adce6303d9e90
--- /dev/null
+++ b/chrome/test/data/extensions/platform_apps/ad_view/loadabort_event/chrometest.js
@@ -0,0 +1,32 @@
+// Copyright 2013 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.
+
+// This test checks the "loadabort" event is called when the "src" attribute
+// of an <adview> is an invalid URL.
+
+function runTests(guestURL) {
+  chrome.test.runTests([
+    function test() {
+      var adview = document.getElementsByTagName("adview")[0];
+
+      adview.addEventListener("loadabort", function(event) {
+        var url = event.url;
+        var isTopLevel = event.isTopLevel;
+        chrome.test.assertEq(guestURL, url);
+        chrome.test.assertEq(true, isTopLevel);
+        console.log("loadabort event called: url=" + url);
+        chrome.test.succeed();
+      })
+
+      adview.setAttribute("src", guestURL);
+    }
+  ]);
+}
+
+window.onload = function() {
+  chrome.test.getConfig(function(config) {
+    var guestURL = 'http://255.255.255.255/fake_file.html';
+    runTests(guestURL);
+  });
+}