Fix PyAuto breakage introduced by 148809.

BUG=None
TEST=policy.PolicyTest.testSetDownloadDirectory
NOTRY=True


Review URL: https://chromiumcodereview.appspot.com/10835023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148829 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/pyautolib/pyauto.py

@@ -1966,8 +1966,8 @@ class PyUITest(pyautolib.PyUITestBase, unittest.TestCase):
       '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):