Fix a flaky GViewRequestInterceptorTest by refreshing the plugins list before every test case.

chrome/browser/chromeos/gview_request_interceptor_unittest.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 <string>
+#include <vector>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "chrome/browser/chrome_plugin_service_filter.h"
 #include "chrome/browser/chromeos/gview_request_interceptor.h"
 #include "chrome/browser/plugin_prefs.h"
 #include "chrome/browser/plugin_prefs_factory.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/test/base/testing_pref_service.h"
 #include "content/browser/mock_resource_context.h"
@@ skipping 77 matching lines @@
     plugin_prefs_ = new PluginPrefs();
     plugin_prefs_->SetPrefs(&prefs_);
     ChromePluginServiceFilter* filter =
         ChromePluginServiceFilter::GetInstance();
     filter->RegisterResourceContext(plugin_prefs_, resource_context);
     PluginService::GetInstance()->set_filter(filter);
 
     ASSERT_TRUE(PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_path_));
 
     handler_ = new content::DummyResourceHandler();
+
+    PluginService::GetInstance()->RefreshPluginList();
+    PluginService::GetInstance()->GetPlugins(base::Bind(&QuitMessageLoop));
+    MessageLoop::current()->Run();
   }
 
   virtual void TearDown() {
     plugin_prefs_->ShutdownOnUIThread();
     content::ResourceContext* resource_context =
         content::MockResourceContext::GetInstance();
     net::URLRequestContext* request_context =
         resource_context->request_context();
     request_context->set_job_factory(old_factory_);
     ChromePluginServiceFilter* filter =
@@ skipping 142 matching lines @@
   request.Start();
   MessageLoop::current()->Run();
   EXPECT_EQ(1, test_delegate_.received_redirect_count());
   EXPECT_EQ(GURL("http://docs.google.com/gview?url=http%3A//foo.com/file.ppt"),
                  request.url());
 }
 
 }  // namespace
 
 }  // namespace chromeos