IDL: Add keys()/values()/entries() to maplike<>/setlike<> interfaces

Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # 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
@@ skipping 351 matching lines @@
         })
 
         def generated_iterator_method(name):
             return generated_method(
                 return_type=IdlType('Iterator'),
                 name=name,
                 extended_attributes=used_extended_attributes)
 
         iterator_method = generated_iterator_method('iterator')
 
-        if interface.iterable:
+        if interface.iterable or interface.maplike or interface.setlike:
             methods.extend([
                 generated_iterator_method('keys'),
                 generated_iterator_method('values'),
                 generated_iterator_method('entries'),
             ])
 
         # FIXME: maplike<> and setlike<> should also imply the presence of a
         # subset of keys(), values(), entries(), forEach(), has(), get(), add(),
         # set(), delete() and clear(), and a 'size' attribute.
 
@@ skipping 927 matching lines @@
         deleter = next(
             method
             for method in interface.operations
             if ('deleter' in method.specials and
                 len(method.arguments) == 1 and
                 str(method.arguments[0].idl_type) == 'DOMString'))
     except StopIteration:
         return None
 
     return property_deleter(deleter)