Clean up V8 bindings template code

third_party/WebKit/Source/bindings/scripts/code_generator_v8.py

 # 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.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 55 matching lines @@
 
 # jinja2 is in chromium's third_party directory.
 # Insert at 1 so at front to override system libraries, and
 # after path[0] == invoking script dir
 sys.path.insert(1, third_party_dir)
 import jinja2
 
 from idl_definitions import Visitor
 import idl_types
 from idl_types import IdlType
+from v8_attributes import attribute_filters
 import v8_callback_interface
 import v8_dictionary
 from v8_globals import includes, interfaces
 import v8_interface
 import v8_types
 import v8_union
-from v8_utilities import capitalize, cpp_name, v8_class_name
+from v8_utilities import capitalize, cpp_name, unique_by, v8_class_name
 from utilities import KNOWN_COMPONENTS, idl_filename_to_component, is_valid_component_dependency, is_testing_target, shorten_union_name
 
 
 def normalize_and_sort_includes(include_paths):
     normalized_include_paths = []
     for include_path in include_paths:
         match = re.search(r'/gen/blink/(.*)$', posixpath.abspath(include_path))
         if match:
             include_path = match.group(1)
         normalized_include_paths.append(include_path)
@@ skipping 320 matching lines @@
         # Bytecode cache is not concurrency-safe unless pre-cached:
         # if pre-cached this is read-only, but writing creates a race condition.
         bytecode_cache=jinja2.FileSystemBytecodeCache(cache_dir),
         keep_trailing_newline=True,  # newline-terminate generated files
         lstrip_blocks=True,  # so can indent control flow tags
         trim_blocks=True)
     jinja_env.filters.update({
         'blink_capitalize': capitalize,
         'exposed': exposed_if,
         'runtime_enabled': runtime_enabled_if,
+        'unique_by': unique_by,
         })
+    jinja_env.filters.update(attribute_filters())
     return jinja_env
 
 
 def generate_indented_conditional(code, conditional):
     # Indent if statement to level of original code
     indent = re.match(' *', code).group(0)
     return ('%sif (%s) {\n' % (indent, conditional) +
             '    %s\n' % '\n    '.join(code.splitlines()) +
             '%s}\n' % indent)
 
@@ skipping 33 matching lines @@
 
     # Create a dummy file as output for the build system,
     # since filenames of individual cache files are unpredictable and opaque
     # (they are hashes of the template path, which varies based on environment)
     with open(dummy_filename, 'w') as dummy_file:
         pass  # |open| creates or touches the file
 
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))