Fix OS_MACOS typos. Should be OS_MACOSX.

base/path_service_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/path_service.h"
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 44 matching lines @@
       return (result &&
               ::GetDefaultUserProfileDirectory(default_profile_path, &size) &&
               StartsWith(path.value(), default_profile_path, false));
     }
   } else if (dir_type == base::DIR_TASKBAR_PINS) {
     // There is no pinned-to-taskbar shortcuts prior to Win7.
     if (base::win::GetVersion() < base::win::VERSION_WIN7)
       check_path_exists = false;
   }
 #endif
-#if defined(OS_MAC)
+#if defined(OS_MACOSX)
   if (dir_type != base::DIR_EXE && dir_type != base::DIR_MODULE &&
       dir_type != base::FILE_EXE && dir_type != base::FILE_MODULE) {
     if (path.ReferencesParent())
       return false;
   }
 #else
   if (path.ReferencesParent())
     return false;
 #endif
   return result && !path.empty() && (!check_path_exists ||
@@ skipping 131 matching lines @@
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   EXPECT_TRUE(PathService::Override(base::DIR_TEMP, temp_dir.path()));
   base::FilePath new_user_data_dir;
   EXPECT_TRUE(PathService::Get(base::DIR_TEMP, &new_user_data_dir));
   EXPECT_NE(original_user_data_dir, new_user_data_dir);
 
   EXPECT_TRUE(PathService::RemoveOverride(base::DIR_TEMP));
   EXPECT_TRUE(PathService::Get(base::DIR_TEMP, &new_user_data_dir));
   EXPECT_EQ(original_user_data_dir, new_user_data_dir);
 }