Fix retrying on HTTP 502, my last patch remove this specific case.

scm.py

 # Copyright (c) 2006-2009 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.
 
 """SCM-specific utility classes."""
 
 import cStringIO
 import glob
 import os
 import re
@@ skipping 433 matching lines @@
                                in_directory,
                                verbose,
                                True,
                                CaptureMatchingLines)
       except gclient_utils.Error:
         def IsKnownFailure():
           for x in failure:
             if (x.startswith('svn: OPTIONS of') or
                 x.startswith('svn: PROPFIND of') or
                 x.startswith('svn: REPORT of') or
-                x.startswith('svn: Unknown hostname')):
+                x.startswith('svn: Unknown hostname') or
+                x.startswith('svn: Server sent unexpected return value')):
               return True
           return False
 
         # Subversion client is really misbehaving with Google Code.
         if args[0] == 'checkout':
           # Ensure at least one file was checked out, otherwise *delete* the
           # directory.
           if len(file_list) == previous_list_len:
             if not IsKnownFailure():
               # No known svn error was found, bail out.
@@ skipping 471 matching lines @@
     if not SVN.current_version:
       SVN.current_version = SVN.Capture(['--version']).split()[2]
     current_version_list = map(only_int, SVN.current_version.split('.'))
     for min_ver in map(int, min_version.split('.')):
       ver = current_version_list.pop(0)
       if ver < min_ver:
         return (False, SVN.current_version)
       elif ver > min_ver:
         return (True, SVN.current_version)
     return (True, SVN.current_version)