Slim down set of things updated by roll script

tools/json_comment_eater/json_comment_eater.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.
-
-'''Utility to remove comments from JSON files so that they can be parsed by
-json.loads.
-'''
-
-import sys
-
-
-def _Rcount(string, chars):
-  '''Returns the number of consecutive characters from |chars| that occur at the
-  end of |string|.
-  '''
-  return len(string) - len(string.rstrip(chars))
-
-
-def _FindNextToken(string, tokens, start):
-  '''Finds the next token in |tokens| that occurs in |string| from |start|.
-  Returns a tuple (index, token key).
-  '''
-  min_index, min_key = (-1, None)
-  for k in tokens:
-    index = string.find(k, start)
-    if index != -1 and (min_index == -1 or index < min_index):
-      min_index, min_key = (index, k)
-  return (min_index, min_key)
-
-
-def _ReadString(input, start, output):
-  output.append('"')
-  start_range, end_range = (start, input.find('"', start))
-  # \" escapes the ", \\" doesn't, \\\" does, etc.
-  while (end_range != -1 and
-         _Rcount(input[start_range:end_range], '\\') % 2 == 1):
-    start_range, end_range = (end_range, input.find('"', end_range + 1))
-  if end_range == -1:
-    return start_range + 1
-  output.append(input[start:end_range + 1])
-  return end_range + 1
-
-
-def _ReadComment(input, start, output):
-  eol_tokens = ('\n', '\r')
-  eol_token_index, eol_token = _FindNextToken(input, eol_tokens, start)
-  if eol_token is None:
-    return len(input)
-  output.append(eol_token)
-  return eol_token_index + len(eol_token)
-
-
-def Nom(input):
-  token_actions = {
-    '"': _ReadString,
-    '//': _ReadComment,
-  }
-  output = []
-  pos = 0
-  while pos < len(input):
-    token_index, token = _FindNextToken(input, token_actions.keys(), pos)
-    if token is None:
-      output.append(input[pos:])
-      break
-    output.append(input[pos:token_index])
-    pos = token_actions[token](input, token_index + len(token), output)
-  return ''.join(output)
-
-
-if __name__ == '__main__':
-    sys.stdout.write(Nom(sys.stdin.read()))