WIP IDL compiler rewrite

Source/bindings/templates/constants.cpp

+{# FIXME: remove all the conditional_string blocks once test removed #}
+{# FIXME: should use name_reflect instead of name #}
+{# FIXME: do we need separate value and value_raw? #}
+{% macro class_consts() %}
+static const V8DOMConfiguration::BatchedConstant {{v8_class_name}}Consts[] = {
+{% for constant in constants %}
+{% if not constant.enabled_at_runtime %}
+{% if constant.conditional_string %}
+#if {{constant.conditional_string}}
+{% endif %}
+    {"{{constant.name}}", {{constant.value}}},
+{% if constant.conditional_string %}
+#endif // {{constant.conditional_string}}
+{% endif %}
+{% endif %}{# not constant.enabled_at_runtime #}
+{% endfor %}
+};
+{% if not do_not_check_constants %}
+
+
+{% for constant in constants %}
+{% if constant.conditional_string %}
+#if {{constant.conditional_string}}
+{% endif %}
+COMPILE_ASSERT({{constant.value_raw}} == {{cpp_class_name}}::{{constant.name_reflect}}, {{cpp_class_name}}Enum{{constant.name_reflect}}IsWrongUseDoNotCheckConstants);
+{% if constant.conditional_string %}
+#endif // {{constant.conditional_string}}
+{% endif %}
+{% endfor %}
+{% endif %}{# not do_not_check_constants #}
+{% endmacro %}{# class_consts #}
+
+
+{% macro const_data(constant) %}
+{% if constant.enabled_at_runtime %}
+{% if constant.conditional_string %}
+#if {{constant.conditional_string}}
+{% endif %}
+    if ({{constant.enable_function}}()) {
+        static const V8DOMConfiguration::BatchedConstant constData = {"{{constant.name}}", static_cast<signed int>({{constant.value}})};
+        V8DOMConfiguration::batchConfigureConstants(desc, proto, &constData, 1, isolate);
+    }
+{% if constant.conditional_string %}
+#endif // {{constant.conditional_string}}
+{%- endif %}
+{% endif %}
+{% endmacro %}{# const_data #}
+
+
+{% macro batch_configure_constants() %}
+V8DOMConfiguration::batchConfigureConstants(desc, proto, {{v8_class_name}}Consts, WTF_ARRAY_LENGTH({{v8_class_name}}Consts), isolate);
+{%- endmacro %}