Improve <adview> implementation and add tests.

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

Index: chrome/test/data/extensions/platform_apps/ad_view/flag_required/chrometest.js
diff --git a/chrome/test/data/extensions/platform_apps/ad_view/flag_required/chrometest.js b/chrome/test/data/extensions/platform_apps/ad_view/flag_required/chrometest.js
new file mode 100644
index 0000000000000000000000000000000000000000..73db818eff20c6eb2576fe275e29a77fce820671
--- /dev/null
+++ b/chrome/test/data/extensions/platform_apps/ad_view/flag_required/chrometest.js
@@ -0,0 +1,33 @@
+// Copyright (c) 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.
+
+
+chrome.test.getConfig(function(config) {
+  var adview = document.getElementsByTagName("adview")[0];
+
+  adview.addEventListener("loadcommit", function() {
+    chrome.test.fail('Ad network should not be loaded if adview command line' +
+      'flag is not set.');
+  })
+
+  adview.addEventListener("loadabort", function() {
+    chrome.test.fail('Ad network should not be loaded if adview command line' +
+      'flag is not set.');
+  })
+
+  // Note: Assertions have to occur in a callback function because of the
+  //  way mutation events are processed. See
+  //  http://lists.w3.org/Archives/Public/public-webapps/2011JulSep/1622.html
+  setTimeout(function() {
+    chrome.test.assertEq(undefined, adview['src']);
+    chrome.test.assertEq(undefined, adview['ad-network']);
+    chrome.test.assertEq(undefined, adview['name']);
+
+    chrome.test.assertEq(false, adview.hasAttribute('src'));
+    chrome.test.assertEq(true, adview.hasAttribute('ad-network'));
+    chrome.test.assertEq(false, adview.hasAttribute('name'));
+
+    chrome.test.sendMessage('test-finished');
+  }, 0);
+});