Make the ~/.subversion/config check a notice instead of an error.

PRESUBMIT.py

 # Copyright (c) 2010 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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
 
@@ skipping 83 matching lines @@
       'http://src.chromium.org/viewvc/chrome/trunk/tools/build/slave/config\n')
 
   try:
     lines = open(path, 'r').read().splitlines()
     # Make sure auto-props is enabled and check for 2 Chromium standard
     # auto-prop.
     if (not '*.cc = svn:eol-style=LF' in lines or
         not '*.pdf = svn:mime-type=application/pdf' in lines or
         not 'enable-auto-props = yes' in lines):
       return [
-          output_api.PresubmitError(
+          output_api.PresubmitNotifyResult(
               'It looks like you have not configured your subversion config '
               'file or it is not up-to-date.\n' + error_msg)
       ]
   except (OSError, IOError):
     return [
-        output_api.PresubmitError(
+        output_api.PresubmitNotifyResult(
             'Can\'t find your subversion config file.\n' + error_msg)
     ]
   return []
 
 
 def _CheckConstNSObject(input_api, output_api, source_file_filter):
   """Checks to make sure no objective-c files have |const NSSomeClass*|."""
   pattern = input_api.re.compile(r'const\s+NS\w*\s*\*')
   files = []
   for f in input_api.AffectedSourceFiles(source_file_filter):
@@ skipping 95 matching lines @@
   results.extend(input_api.canned_checks.CheckChangeHasBugField(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasTestField(
       input_api, output_api))
   results.extend(_CheckSubversionConfig(input_api, output_api))
   return results
 
 
 def GetPreferredTrySlaves():
   return ['win', 'linux', 'mac']