[Bindings] Remove a redundant option write-file-if-only-changed in bindings

third_party/WebKit/Source/bindings/scripts/compute_global_objects.py

 #!/usr/bin/python
 #
 # Copyright 2014 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.
 
 """Compute global objects.
 
 Global objects are defined by interfaces with [Global] or [PrimaryGlobal] on
 their definition: http://heycam.github.io/webidl/#Global
@@ skipping 11 matching lines @@
 GLOBAL_EXTENDED_ATTRIBUTES = frozenset([
     'Global',
     'PrimaryGlobal',
 ])
 
 
 def parse_options():
     usage = 'Usage: %prog [options] [GlobalObjectsComponent.pickle]... [GlobalObjects.pickle]'
     parser = optparse.OptionParser(usage=usage)
     parser.add_option('--idl-files-list', help='file listing IDL files')
-    parser.add_option('--write-file-only-if-changed', type='int', help='if true, do not write an output file if it would be identical to the existing one, which avoids unnecessary rebuilds in ninja')
 
     options, args = parser.parse_args()
 
     if options.idl_files_list is None:
         parser.error('Must specify a file listing IDL files using --idl-files-list.')
-    if options.write_file_only_if_changed is None:
-        parser.error('Must specify whether output files are only written if changed using --write-file-only-if-changed.')
-    options.write_file_only_if_changed = bool(options.write_file_only_if_changed)
     if not args:
         parser.error('Must specify an output pickle filename as argument, '
                      'optionally preceeded by input pickle filenames.')
 
     return options, args
 
 
 def dict_union(dicts):
     return dict((k, v) for d in dicts for k, v in d.iteritems())
 
@@ skipping 45 matching lines @@
         existing_interface_name_global_names
         for existing_interface_name_global_names in read_pickle_files(args))
 
     # Input IDL files are passed in a file, due to OS command line length
     # limits. This is generated at GYP time, which is ok b/c files are static.
     idl_files = read_file_to_list(options.idl_files_list)
     interface_name_global_names.update(
             idl_files_to_interface_name_global_names(idl_files))
 
     write_pickle_file(output_global_objects_filename,
-                      interface_name_global_names,
-                      options.write_file_only_if_changed)
+                      interface_name_global_names)
 
 
 if __name__ == '__main__':
     sys.exit(main())