add PRESUBMIT for native_client_sdk.

native_client_sdk/src/build_tools/manifest_util.py

 # 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.
 
 import copy
 import hashlib
 import json
 import sys
 
 MANIFEST_VERSION = 2
@@ skipping 29 matching lines @@
 def GetHostOS():
   '''Returns the host_os value that corresponds to the current host OS'''
   return {
       'linux2': 'linux',
       'darwin': 'mac',
       'cygwin': 'win',
       'win32':  'win'
       }[sys.platform]
 
 
-def DictToJSON(dict):
+def DictToJSON(pydict):
   """Convert a dict to a JSON-formatted string."""
-  pretty_string = json.dumps(dict, sort_keys=False, indent=2)
+  pretty_string = json.dumps(pydict, sort_keys=False, indent=2)
   # json.dumps sometimes returns trailing whitespace and does not put
   # a newline at the end.  This code fixes these problems.
   pretty_lines = pretty_string.split('\n')
   return '\n'.join([line.rstrip() for line in pretty_lines]) + '\n'
 
 
 def DownloadAndComputeHash(from_stream, to_stream=None, progress_func=None):
   ''' Download the archive data from from-stream and generate sha1 and
       size info.
 
@@ skipping 38 matching lines @@
 
 
 class Archive(dict):
   """A placeholder for sdk archive information. We derive Archive from
      dict so that it is easily serializable. """
 
   def __init__(self, host_os_name):
     """ Create a new archive for the given host-os name. """
     self['host_os'] = host_os_name
 
-  def CopyFrom(self, dict):
+  def CopyFrom(self, src):
     """Update the content of the archive by copying values from the given
        dictionary.
 
     Args:
-      dict: The dictionary whose values must be copied to the archive."""
-    for key, value in dict.items():
+      src: The dictionary whose values must be copied to the archive."""
+    for key, value in src.items():
       self[key] = value
 
   def Validate(self):
     """Validate the content of the archive object. Raise an Error if
        an invalid or missing field is found.
 
     Returns: True if self is a valid bundle.
     """
     host_os = self.get('host_os', None)
     if host_os and host_os not in HOST_OS_LITERALS:
@@ skipping 385 matching lines @@
           new_bundle.CopyFrom(b)
           bundles.append(new_bundle)
         self._manifest_data[key] = bundles
       else:
         self._manifest_data[key] = value
     self.Validate()
 
   def GetDataAsString(self):
     """Returns the current JSON manifest object, pretty-printed"""
     return DictToJSON(self._manifest_data)