new_contents: # 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.
  
  """
  See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
  for more details on the presubmit API built into gcl.
  """
  
  def CheckChange(input_api, output_api):
    """Checks the memcheck suppressions files for bad data."""
    errors = []
    skip_next_line = False
    func_re = input_api.re.compile('[a-z_.]+\(.+\)$')
    for f, line_num, line in input_api.RightHandSideLines(lambda x:
        x.LocalPath().endswith('.txt')):
      line = line.lstrip()
      if line.startswith('#') or not line:
        continue
  
      if skip_next_line:
        skip_next_line = False
        continue
      if line == '{':
        skip_next_line = True
        continue
      if (line.startswith('fun:') or line.startswith('obj:') or
          line == 'Heapcheck:Leak' or line == '}' or
          line == '...'):
        continue
      if func_re.match(line):
        continue
      errors.append('"%s" is probably wrong: %s line %s' % (line, f.LocalPath(),
                                                            line_num))
    if errors:
      return [output_api.PresubmitError('\n'.join(errors))]
    return []
  
  def CheckChangeOnUpload(input_api, output_api):
    return CheckChange(input_api, output_api)
  
  def CheckChangeOnCommit(input_api, output_api):
    return CheckChange(input_api, output_api)
  
subject: Add presubmit checks for suppressions.