Fix python scripts in src/tools/

tools/export_tarball/export_tarball.py

-#!/usr/bin/python
+#!/usr/bin/env python
 # Copyright (c) 2011 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.
 
 """
 This tool creates a tarball with all the sources, but without .svn directories.
 
 It can also remove files which are not strictly required for build, so that
 the resulting tarball can be reasonably small (last time it was ~110 MB).
 
 Example usage:
 
 export_tarball.py /foo/bar
 
 The above will create file /foo/bar.tar.bz2.
 """
 
 import optparse
 import os
 import subprocess
 import sys
 import tarfile
 
+
 NONESSENTIAL_DIRS = (
     'chrome/common/extensions/docs',
     'chrome/test/data',
     'chrome/tools/test/reference_build',
     'courgette/testdata',
     'data',
     'native_client/src/trusted/service_runtime/testdata',
     'src/chrome/test/data',
     'o3d/documentation',
     'o3d/samples',
@@ skipping 15 matching lines @@
     'third_party/yasm/source/patched-yasm/modules/objfmts/win32/tests',
     'third_party/yasm/source/patched-yasm/modules/objfmts/win64/tests',
     'third_party/yasm/source/patched-yasm/modules/objfmts/xdf/tests',
     'third_party/WebKit/Source/JavaScriptCore/tests',
     'third_party/WebKit/LayoutTests',
     'v8/test',
     'webkit/data/layout_tests',
     'webkit/tools/test/reference_build',
 )
 
+
 def GetSourceDirectory():
   return os.path.realpath(
     os.path.join(os.path.dirname(__file__), '..', '..', '..', 'src'))
 
+
 # Workaround lack of the exclude parameter in add method in python-2.4.
 # TODO(phajdan.jr): remove the workaround when it's not needed on the bot.
 class MyTarFile(tarfile.TarFile):
   def set_remove_nonessential_files(self, remove):
     self.__remove_nonessential_files = remove
 
   def add(self, name, arcname=None, recursive=True, exclude=None):
     head, tail = os.path.split(name)
     if tail in ('.svn', '.git'):
       return
 
     if self.__remove_nonessential_files:
       for nonessential_dir in NONESSENTIAL_DIRS:
         dir_path = os.path.join(GetSourceDirectory(), nonessential_dir)
         if name.startswith(dir_path):
           return
 
     tarfile.TarFile.add(self, name, arcname=arcname, recursive=recursive)
 
+
 def main(argv):
   parser = optparse.OptionParser()
   parser.add_option("--remove-nonessential-files",
                     dest="remove_nonessential_files",
                     action="store_true", default=False)
 
   options, args = parser.parse_args(argv)
 
   if len(args) != 1:
     print 'You must provide only one argument: output file name'
     print '(without .tar.bz2 extension).'
     return 1
 
   if not os.path.exists(GetSourceDirectory()):
     print 'Cannot find the src directory.'
     return 1
 
   output_fullname = args[0] + '.tar.bz2'
   output_basename = os.path.basename(args[0])
 
   archive = MyTarFile.open(output_fullname, 'w:bz2')
   archive.set_remove_nonessential_files(options.remove_nonessential_files)
   try:
     archive.add(GetSourceDirectory(), arcname=output_basename)
   finally:
     archive.close()
 
   return 0
 
+
 if __name__ == "__main__":
   sys.exit(main(sys.argv[1:]))