old_contents: #!/usr/bin/python
  
  # Copyright (c) 2009 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.
  
  """Makes sure that the app/ code is cpplint clean."""
  
  INCLUDE_CPP_FILES_ONLY = (
    r'.*\.cc$', r'.*\.h$'
  )
  
  EXCLUDE = (
    # Autogenerated window resources files are off limits
    r'.*resource.h$',
  )
  
  def CheckChangeOnUpload(input_api, output_api):
    results = []
    black_list = input_api.DEFAULT_BLACK_LIST + EXCLUDE
    sources = lambda x: input_api.FilterSourceFile(
      x, white_list=INCLUDE_CPP_FILES_ONLY, black_list=black_list)
    results.extend(input_api.canned_checks.CheckChangeLintsClean(
        input_api, output_api, sources))
    return results
  
new_contents: #!/usr/bin/python
  
  # Copyright (c) 2009 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.
  
  """Makes sure that the app/ code is cpplint clean."""
  
  INCLUDE_CPP_FILES_ONLY = (
    r'.*\.cc$', r'.*\.h$'
  )
  
  EXCLUDE = (
    # Autogenerated window resources files are off limits
    r'.*resource.h$',
  )
  
  def CheckChangeOnUpload(input_api, output_api):
    results = []
    black_list = input_api.DEFAULT_BLACK_LIST + EXCLUDE
    sources = lambda x: input_api.FilterSourceFile(
      x, white_list=INCLUDE_CPP_FILES_ONLY, black_list=black_list)
    results.extend(input_api.canned_checks.CheckChangeLintsClean(
        input_api, output_api, sources))
    return results
  
  def GetPreferredTrySlaves():
    return ['win', 'linux', 'linux_view', 'linux_chromeos', 'mac']
  
subject: Make all changes to app/ run on all trybot platforms, not just the big three. Anyone who's changing a header here may break the chromeos build.