Move some XDG code from chrome to base.

base/test/test_suite.h

 // Copyright (c) 2009 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.
 
 #ifndef BASE_TEST_SUITE_H_
 #define BASE_TEST_SUITE_H_
 
 // Defines a basic test suite framework for running gtest based tests.  You can
 // instantiate this class in your main function and call its Run method to run
 // any gtest based tests that are linked into your executable.
 
 #include "base/at_exit.h"
 #include "base/base_paths.h"
 #include "base/debug_on_start.h"
 #include "base/i18n/icu_util.h"
 #include "base/multiprocess_test.h"
 #include "base/nss_init.h"
+#include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/scoped_nsautorelease_pool.h"
 #include "base/scoped_ptr.h"
 #include "base/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/multiprocess_func_list.h"
 
 #if defined(OS_LINUX)
 #include <gtk/gtk.h>
 #endif
@@ skipping 184 matching lines @@
 
   virtual void Shutdown() {
   }
 
   // Make sure that we setup an AtExitManager so Singleton objects will be
   // destroyed.
   base::AtExitManager at_exit_manager_;
 };
 
 #endif  // BASE_TEST_SUITE_H_