[Bindings][Refactoring] Make binding scripts use utilities to handle pickle files

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

 #!/usr/bin/python
 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 63 matching lines @@
         paths for use in C++ #include directives because of dependencies in
         other component
 
 Note that all of these are stable information, unlikely to change without
 moving or deleting files (hence requiring a full rebuild anyway) or significant
 code changes (for inherited extended attributes).
 
 Design doc: http://www.chromium.org/developers/design-documents/idl-build
 """
 
-from collections import defaultdict
-import cPickle as pickle
+# pylint: disable=relative-import
+
 import optparse
 import sys
 
-from utilities import idl_filename_to_component, read_pickle_files, write_pickle_file, merge_dict_recursively, shorten_union_name
+from collections import defaultdict
+from utilities import idl_filename_to_component
+from utilities import merge_dict_recursively
+from utilities import read_pickle_files
+from utilities import shorten_union_name
+from utilities import write_pickle_file
 
 INHERITED_EXTENDED_ATTRIBUTES = set([
     'ActiveScriptWrappable',
     'DependentLifetime',
 ])
 
 # Main variable (filled in and exported)
 interfaces_info = {}
 
 # Auxiliary variables (not visible to future build steps)
@@ skipping 214 matching lines @@
     # args = Input1, Input2, ..., Output
     interfaces_info_filename = args.pop()
     info_individuals = read_pickle_files(args)
 
     compute_interfaces_info_overall(info_individuals)
     write_pickle_file(interfaces_info_filename, interfaces_info)
 
 
 if __name__ == '__main__':
     sys.exit(main())