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

third_party/WebKit/Source/bindings/scripts/generate_init_partial_interfaces.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.
 
 """Generate initPartialInterfacesInModules(), which registers partial interfaces in modules to core interfaces."""
 
 import cPickle as pickle
 from optparse import OptionParser
 import os
@@ skipping 24 matching lines @@
 
 } // namespace blink
 """
 
 
 def parse_options():
     usage = 'Usage: %prog [options]'
     parser = OptionParser(usage=usage)
     parser.add_option('--idl-files-list', help="a text file containing the IDL file paths, so the command line doesn't exceed OS length limits.")
     parser.add_option('--gyp-format-list', default=False, action='store_true', help="if specified, idl-files-list is newline separated. When unspecified, it's formatted as a Posix command line.")
-    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')
     parser.add_option('--output')
 
     options, args = parser.parse_args()
     if options.output is None:
         parser.error('Must specify output file using --output.')
     if options.idl_files_list is None:
         parser.error('Must specify a list of IDL files using --idl-files-list.')
-    if options.write_file_only_if_changed is None:
-        parser.error('Must specify whether file is only written if changed using --write-file-only-if-changed.')
-    options.write_file_only_if_changed = bool(options.write_file_only_if_changed)
     return options
 
 
 def extract_meta_data(file_paths):
     """Extracts interface name from each IDL file."""
     meta_data_list = []
 
     for file_path in file_paths:
         if not file_path.endswith('.idl'):
             print 'WARNING: non-IDL file passed: "%s"' % file_path
@@ skipping 30 matching lines @@
     includes = ['#include "bindings/modules/v8/%s.h"' % interface_name
                 for interface_name in interface_names]
     initialize_calls = ['    %s::initialize();' % interface_name
                         for interface_name in interface_names]
 
     content = _INIT_PARTIAL_INTERFACE % (
         _COPYRIGHT,
         '\n'.join(includes),
         '\n'.join(initialize_calls))
 
-    write_file(content, options.output,
-               only_if_changed=options.write_file_only_if_changed)
+    write_file(content, options.output)
 
 
 if __name__ == '__main__':
     sys.exit(main())