Add forEach() to CSSVariablesMap

Source/bindings/scripts/unstable/v8_utilities.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 19 matching lines @@
 
 FIXME: Not currently used in build.
 This is a rewrite of the Perl IDL compiler in Python, but is not complete.
 Once it is complete, we will switch all IDL files over to Python at once.
 Until then, please work on the Perl IDL compiler.
 For details, see bug http://crbug.com/239771
 """
 
 # FIXME: eliminate this file if possible
 
+import re
 import v8_types
 
 ACRONYMS = ['CSS', 'HTML', 'IME', 'JS', 'SVG', 'URL', 'WOFF', 'XML', 'XSLT']
+extended_attribute_value_separator_re = re.compile('[|&]')
 
 
 def cpp_implemented_as_name(definition_or_member):
     return definition_or_member.extended_attributes.get('ImplementedAs', definition_or_member.name)
 
 
 def generate_conditional_string(definition_or_member):
     if 'Conditional' not in definition_or_member.extended_attributes:
         return ''
     conditional = definition_or_member.extended_attributes['Conditional']
@@ skipping 25 matching lines @@
     """
     for acronym in ACRONYMS:
         if name.startswith(acronym):
             name.replace(acronym, acronym.lower())
             return name
     return name[0].lower() + name[1:]
 
 
 def v8_class_name(interface):
     return v8_types.v8_type(interface.name)
+
+
+def has_extended_attribute_value(extended_attributes, key, value):
+    return key in extended_attributes and value in extended_attribute_values(extended_attributes, key)
+
+
+def extended_attribute_values(extended_attributes, key):
+    if key not in extended_attributes:
+        return None
+    values_string = extended_attributes[key]
+    if not values_string:
+        return []
+    return extended_attribute_value_separator_re.split(values_string)