Protect against unknown idl types

Source/bindings/scripts/v8_types.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 325 matching lines @@
     if base_idl_type.endswith('ConstructorConstructor'):
         # FIXME: rename to NamedConstructor
         # FIXME: replace with a [NamedConstructorAttribute] extended attribute
         # Ending with 'ConstructorConstructor' indicates a named constructor,
         # and these do not have header files, as they are part of the generated
         # bindings for the interface
         return set()
     if base_idl_type.endswith('Constructor'):
         # FIXME: replace with a [ConstructorAttribute] extended attribute
         base_idl_type = idl_type.constructor_type_name
+    if base_idl_type not in component_dir:
+        return set()
     return set(['bindings/%s/v8/V8%s.h' % (component_dir[base_idl_type],
                                            base_idl_type)])
 
 IdlType.includes_for_type = property(includes_for_type)
 IdlUnionType.includes_for_type = property(
     lambda self: set.union(*[includes_for_type(member_type)
                              for member_type in self.member_types]))
 
 
 def add_includes_for_type(idl_type):
@@ skipping 344 matching lines @@
 
 def literal_cpp_value(idl_type, idl_literal):
     """Converts an expression that is a valid C++ literal for this type."""
     # FIXME: add validation that idl_type and idl_literal are compatible
     literal_value = str(idl_literal)
     if idl_type.base_type in CPP_UNSIGNED_TYPES:
         return literal_value + 'u'
     return literal_value
 
 IdlType.literal_cpp_value = literal_cpp_value