binding: Retires ExceptionState::throwIfNeeded().

third_party/WebKit/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 608 matching lines @@
     set_expression = None
     # Optional expression that returns true if the conversion fails.
     check_expression = None
     # Optional expression used as the return value when returning. Only
     # meaningful if 'check_expression' is not None.
     return_expression = bailout_return_value
 
     if idl_type.is_string_type or idl_type.v8_conversion_needs_exception_state:
         # Types for which conversion can fail and that need error handling.
 
-        if use_exception_state:
-            check_expression = 'exceptionState.hadException()'
-        else:
-            check_expression = 'exceptionState.throwIfNeeded()'
+        check_expression = 'exceptionState.hadException()'
 
         if idl_type.is_dictionary or idl_type.is_union_type:
             set_expression = cpp_value
         else:
             assign_expression = cpp_value
             # Note: 'not idl_type.v8_conversion_needs_exception_state' implies
             # 'idl_type.is_string_type', but there are types for which both are
             # true (ByteString and USVString), so using idl_type.is_string_type
             # as the condition here would be wrong.
             if not idl_type.v8_conversion_needs_exception_state:
@@ skipping 348 matching lines @@
     number_of_nullable_member_types_union)
 
 
 def includes_nullable_type_union(idl_type):
     # http://heycam.github.io/webidl/#dfn-includes-a-nullable-type
     return idl_type.number_of_nullable_member_types == 1
 
 IdlTypeBase.includes_nullable_type = False
 IdlNullableType.includes_nullable_type = True
 IdlUnionType.includes_nullable_type = property(includes_nullable_type_union)