Browser plugin: Implement loadRedirect event.

content/test/data/browser_plugin_embedder.html

Index: content/test/data/browser_plugin_embedder.html
diff --git a/content/test/data/browser_plugin_embedder.html b/content/test/data/browser_plugin_embedder.html
index dc2e780d72bebc3e23816992d104a631272d9307..5244fe09787c84feb530aa6e58f2133434270ac8 100644
--- a/content/test/data/browser_plugin_embedder.html
+++ b/content/test/data/browser_plugin_embedder.html
@@ -1,4 +1,17 @@
 <script type="text/javascript">
+var redirectOldUrl;
+var redirectNewUrl;
+function loadRedirect(event) {
+  if (event.isTopLevel) {
+    redirectOldUrl = event.oldUrl;
+    redirectNewUrl = event.newUrl;
+  }
+}
+function RedirectTo(url) {
+  var plugin = document.getElementById('plugin');
+  plugin.addEventListener('loadRedirect', loadRedirect);
+  plugin.src = url;
+}
 function SetSrc(src) {
   var plugin = document.getElementById('plugin');
   plugin.src = src;