Prerendered pages are swapped in at browser::Navigate time.

chrome/browser/ui/webui/net_internals/net_internals_ui_browsertest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/net_internals/net_internals_ui_browsertest.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 322 matching lines @@
 content::WebUIMessageHandler* NetInternalsTest::GetMockMessageHandler() {
   return message_handler_.get();
 }
 
 GURL NetInternalsTest::CreatePrerenderLoaderUrl(
     const GURL& prerender_url) {
   EXPECT_TRUE(StartTestServer());
   std::vector<net::TestServer::StringPair> replacement_text;
   replacement_text.push_back(
       make_pair("REPLACE_WITH_PRERENDER_URL", prerender_url.spec()));
+  replacement_text.push_back(
+      make_pair("REPLACE_WITH_DESTINATION_URL", prerender_url.spec()));
   std::string replacement_path;
   EXPECT_TRUE(net::TestServer::GetFilePathWithReplacements(
       "files/prerender/prerender_loader.html",
       replacement_text,
       &replacement_path));
   GURL url_loader = test_server()->GetURL(replacement_path);
   return url_loader;
 }
 
 bool NetInternalsTest::StartTestServer() {
   if (test_server_started_)
     return true;
   test_server_started_ = test_server()->Start();
   return test_server_started_;
 }