Revert of IDL: Null values should be converted for non-nullable dictionary members

Source/bindings/scripts/v8_dictionary.py

Index: Source/bindings/scripts/v8_dictionary.py
diff --git a/Source/bindings/scripts/v8_dictionary.py b/Source/bindings/scripts/v8_dictionary.py
index e45bd5d618453f8a6e52e7b801d6c168bf44feb8..0cddb519b368e1d0248fea8db776634aafc7b52b 100644
--- a/Source/bindings/scripts/v8_dictionary.py
+++ b/Source/bindings/scripts/v8_dictionary.py
@@ -26,13 +26,6 @@
 def setter_name_for_dictionary_member(member):
     name = v8_utilities.cpp_name(member)
     return 'set%s' % v8_utilities.capitalize(name)
-
-
-def null_setter_name_for_dictionary_member(member):
-    if member.idl_type.is_nullable:
-        name = v8_utilities.cpp_name(member)
-        return 'set%sToNull' % v8_utilities.capitalize(name)
-    return None
 
 
 def has_method_name_for_dictionary_member(member):
@@ -75,7 +68,7 @@
 def member_context(member):
     idl_type = member.idl_type
     idl_type.add_includes_for_type()
-    unwrapped_idl_type = unwrap_nullable_if_needed(idl_type)
+    idl_type = unwrap_nullable_if_needed(idl_type)
 
     def default_values():
         if not member.default_value:
@@ -83,7 +76,7 @@
         if member.default_value.is_null:
             return None, 'v8::Null(isolate)'
         cpp_default_value = str(member.default_value)
-        v8_default_value = unwrapped_idl_type.cpp_value_to_v8_value(
+        v8_default_value = idl_type.cpp_value_to_v8_value(
             cpp_value=cpp_default_value, isolate='isolate',
             creation_context='creationContext')
         return cpp_default_value, v8_default_value
@@ -94,21 +87,19 @@
     return {
         'cpp_default_value': cpp_default_value,
         'cpp_name': cpp_name,
-        'cpp_type': unwrapped_idl_type.cpp_type,
-        'cpp_value_to_v8_value': unwrapped_idl_type.cpp_value_to_v8_value(
+        'cpp_type': idl_type.cpp_type,
+        'cpp_value_to_v8_value': idl_type.cpp_value_to_v8_value(
             cpp_value='impl.%s()' % cpp_name, isolate='isolate',
             creation_context='creationContext',
             extended_attributes=member.extended_attributes),
-        'enum_validation_expression': unwrapped_idl_type.enum_validation_expression,
+        'enum_validation_expression': idl_type.enum_validation_expression,
         'has_method_name': has_method_name_for_dictionary_member(member),
-        'is_nullable': idl_type.is_nullable,
-        'is_object': unwrapped_idl_type.name == 'Object',
+        'is_object': idl_type.name == 'Object',
         'name': member.name,
         'setter_name': setter_name_for_dictionary_member(member),
-        'null_setter_name': null_setter_name_for_dictionary_member(member),
-        'use_output_parameter_for_result': unwrapped_idl_type.use_output_parameter_for_result,
+        'use_output_parameter_for_result': idl_type.use_output_parameter_for_result,
         'v8_default_value': v8_default_value,
-        'v8_value_to_local_cpp_value': unwrapped_idl_type.v8_value_to_local_cpp_value(
+        'v8_value_to_local_cpp_value': idl_type.v8_value_to_local_cpp_value(
             member.extended_attributes, member.name + 'Value',
             member.name, isolate='isolate'),
     }
@@ -174,7 +165,6 @@
         'is_object': is_object,
         'is_traceable': idl_type.is_traceable,
         'member_cpp_type': member_cpp_type(),
-        'null_setter_name': null_setter_name_for_dictionary_member(member),
         'rvalue_cpp_type': idl_type.cpp_type_args(used_as_rvalue_type=True),
         'setter_name': setter_name_for_dictionary_member(member),
     }