Added os to input_api

presubmit_support.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.
 
 """Enables directory-specific presubmit checks to run at upload and/or commit.
 """
 
 __version__ = '1.8.0'
 
@@ skipping 274 matching lines @@
     self.basename = os.path.basename
     self.cPickle = cPickle
     self.cpplint = cpplint
     self.cStringIO = cStringIO
     self.glob = glob.glob
     self.json = json
     self.logging = logging.getLogger('PRESUBMIT')
     self.os_listdir = os.listdir
     self.os_walk = os.walk
     self.os_path = os.path
+    self.os_stat = os.stat
     self.pickle = pickle
     self.marshal = marshal
     self.re = re
     self.subprocess = subprocess
     self.tempfile = tempfile
     self.time = time
     self.traceback = traceback
     self.unittest = unittest
     self.urllib2 = urllib2
 
@@ skipping 1363 matching lines @@
   except PresubmitFailure, e:
     print >> sys.stderr, e
     print >> sys.stderr, 'Maybe your depot_tools is out of date?'
     print >> sys.stderr, 'If all fails, contact maruel@'
     return 2
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   sys.exit(Main(None))