Move JoinString to the base namespace

chrome/browser/extensions/extension_service_unittest.cc

 // Copyright (c) 2013 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 <algorithm>
 #include <set>
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/basictypes.h"
@@ skipping 1788 matching lines @@
   installer->set_allow_silent_install(true);
   installer->InstallUserScript(
       path,
       GURL("http://www.aaronboodman.com/scripts/user_script_basic.user.js"));
 
   base::RunLoop().RunUntilIdle();
   std::vector<base::string16> errors = GetErrors();
   EXPECT_TRUE(installed_) << "Nothing was installed.";
   EXPECT_FALSE(was_update_) << path.value();
   ASSERT_EQ(1u, loaded_.size()) << "Nothing was loaded.";
-  EXPECT_EQ(0u, errors.size()) << "There were errors: "
-                               << JoinString(errors, ',');
+  EXPECT_EQ(0u, errors.size())
+      << "There were errors: "
+      << base::JoinString(errors, base::ASCIIToUTF16(","));
   EXPECT_TRUE(service()->GetExtensionById(loaded_[0]->id(), false))
       << path.value();
 
   installed_ = NULL;
   was_update_ = false;
   loaded_.clear();
   ExtensionErrorReporter::GetInstance()->ClearErrors();
 }
 
 // Extensions don't install during shutdown.
@@ skipping 6280 matching lines @@
 
   service()->Observe(chrome::NOTIFICATION_PROFILE_DESTRUCTION_STARTED,
                      content::Source<Profile>(profile()),
                      content::NotificationService::NoDetails());
   EXPECT_EQ(UnloadedExtensionInfo::REASON_PROFILE_SHUTDOWN, unloaded_reason_);
   EXPECT_EQ(0u, registry()->enabled_extensions().size());
   EXPECT_EQ(0u, registry()->disabled_extensions().size());
   EXPECT_EQ(0u, registry()->terminated_extensions().size());
   EXPECT_EQ(0u, registry()->blacklisted_extensions().size());
 }