Only commit cookie changes in prerenders after a prerender is shown

chrome/browser/extensions/activity_log/activity_log_unittest.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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "chrome/browser/extensions/activity_log/activity_action_constants.h"
@@ skipping 226 matching lines @@
           .Build();
   extension_service_->AddExtension(extension.get());
   ActivityLog* activity_log = ActivityLog::GetInstance(profile());
   ASSERT_TRUE(GetDatabaseEnabled());
   GURL url("http://www.google.com");
 
   prerender::PrerenderManager* prerender_manager =
       prerender::PrerenderManagerFactory::GetForProfile(
           Profile::FromBrowserContext(profile()));
 
+  prerender_manager->OnCookieStoreLoaded();
+
   const gfx::Size kSize(640, 480);
   scoped_ptr<prerender::PrerenderHandle> prerender_handle(
       prerender_manager->AddPrerenderFromLocalPredictor(
           url,
           web_contents()->GetController().GetDefaultSessionStorageNamespace(),
           kSize));
 
   const std::vector<content::WebContents*> contentses =
       prerender_manager->GetAllPrerenderingContents();
   ASSERT_EQ(1U, contentses.size());
@@ skipping 142 matching lines @@
       kExtensionId,
       Action::ACTION_ANY,
       "",
       "",
       "",
       -1,
       base::Bind(ActivityLogTest::RetrieveActions_ArgUrlApiCalls));
 }
 
 }  // namespace extensions