Fix PyAuto breakage introduced by 148809.

chrome/test/pyautolib/pyauto.py

 #!/usr/bin/env python
 # 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.
 
 """PyAuto: Python Interface to Chromium's Automation Proxy.
 
 PyAuto uses swig to expose Automation Proxy interfaces to Python.
 For complete documentation on the functionality available,
 run pydoc on this file.
@@ skipping 1948 matching lines @@
     Raises:
       pyauto_errors.JSONInterfaceError if the automation call returns an error.
     """
     if tab_index is None:
       tab_index = self.GetActiveTabIndex(windex)
     cmd_dict = {
       'command': 'GetDownloadDirectory',
       'tab_index': tab_index,
       'windex': windex,
     }
-    return FilePath(self._GetResultFromJSONRequest(cmd_dict,
-                                                   windex=None)['path'])
+    return FilePath(str(self._GetResultFromJSONRequest(cmd_dict,
+                                                       windex=None)['path']))
 
   def WaitForAllDownloadsToComplete(self, pre_download_ids=[], windex=0,
                                     timeout=-1):
     """Wait for all pending downloads to complete.
 
     This function assumes that any downloads to wait for have already been
     triggered and have started (it is ok if those downloads complete before this
     function is called).
 
     Args:
@@ skipping 4503 matching lines @@
     successful = result.wasSuccessful()
     if not successful:
       pyauto_tests_file = os.path.join(self.TestsDir(), self._tests_filename)
       print >>sys.stderr, 'Tests can be disabled by editing %s. ' \
                           'Ref: %s' % (pyauto_tests_file, _PYAUTO_DOC_URL)
     sys.exit(not successful)
 
 
 if __name__ == '__main__':
   Main()