Add a test for checking that refreshing a page does load the same WebUI page.

content/browser/webui/web_ui_test_handler.cc

 // Copyright (c) 2011 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 "content/browser/webui/web_ui_test_handler.h"
 
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/test/ui_test_utils.h"
 #include "content/browser/renderer_host/render_view_host.h"
@@ skipping 15 matching lines @@
     MessageLoopForUI::current()->Quit();
 }
 
 void WebUITestHandler::HandleFail(const ListValue* args) {
   test_succeeded_ = false;
   if (is_waiting_)
     MessageLoopForUI::current()->Quit();
 
   std::string message;
   ASSERT_TRUE(args->GetString(0, &message));
-  LOG(INFO) << message;
+  LOG(ERROR) << message;
 }
 
 void WebUITestHandler::RegisterMessages() {
   web_ui_->RegisterMessageCallback("Pass",
       NewCallback(this, &WebUITestHandler::HandlePass));
   web_ui_->RegisterMessageCallback("Fail",
       NewCallback(this, &WebUITestHandler::HandleFail));
 }
 
 bool WebUITestHandler::WaitForResult() {
   is_waiting_ = true;
   ui_test_utils::RunMessageLoop();
   is_waiting_ = false;
   return test_succeeded_;
 }