Fix webkitpy scm_unittests so that they pass again.

Tools/Scripts/webkitpy/common/checkout/scm/svn.py

 # Copyright (c) 2009, 2010, 2011 Google Inc. All rights reserved.
 # Copyright (c) 2009 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 102 matching lines @@
         # FIXME: What about files which are not committed yet?
         return self._run_svn(["diff"], cwd=self.checkout_root, decode_output=False) != ""
 
     def status_command(self):
         return [self.executable_name, 'status']
 
     def _status_regexp(self, expected_types):
         field_count = 6 if self._svn_version() > "1.6" else 5
         return "^(?P<status>[%s]).{%s} (?P<filename>.+)$" % (expected_types, field_count)
 
-    def _add_parent_directories(self, path):
+    def _add_parent_directories(self, path, recurse):
         """Does 'svn add' to the path and its parents."""
         if self.in_working_directory(path):
             return
-        self.add(path)
+        self.add(path, recurse=recurse)
 
-    def add_list(self, paths, return_exit_code=False):
+    def add_list(self, paths, return_exit_code=False, recurse=True):
         for path in paths:
-            self._add_parent_directories(os.path.dirname(os.path.abspath(path)))
-        return self._run_svn(["add"] + paths, return_exit_code=return_exit_code)
+            self._add_parent_directories(os.path.dirname(os.path.abspath(path)),
+                                         recurse=False)
+        if recurse:
+            cmd = ["add"] + paths
+        else:
+            cmd = ["add", "--depth", "empty"] + paths
+        return self._run_svn(cmd, return_exit_code=return_exit_code)
 
     def _delete_parent_directories(self, path):
         if not self.in_working_directory(path):
             return
         if set(os.listdir(path)) - self._svn_metadata_files:
             return  # Directory has non-trivial files in it.
         self.delete(path)
 
     def delete_list(self, paths):
         for path in paths:
@@ skipping 45 matching lines @@
         if changed_files == []:
             return ""
         elif changed_files == None:
             changed_files = []
         return self._run([self._filesystem.join(self.checkout_root, 'Tools', 'Scripts', 'svn-create-patch')] + changed_files,
             cwd=self.checkout_root, return_stderr=False,
             decode_output=False)
 
     def blame(self, path):
         return self._run_svn(['blame', path])