Support deprecation + use counters for constructor attributes.

Source/bindings/templates/interface_base.cpp

 {# http://www.chromium.org/blink/coding-style#TOC-License #}
 /*
  * 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.
@@ skipping 63 matching lines @@
                                 'WrapperTypeObjectPrototype' %}
 {% set will_be_garbage_collected = 'true'
        if is_will_be_garbage_collected else 'false' %}
 const WrapperTypeInfo {{v8_class}}::wrapperTypeInfo = { gin::kEmbedderBlink, {{v8_class}}::domTemplate, {{v8_class}}::derefObject, {{to_active_dom_object}}, {{to_event_target}}, {{visit_dom_wrapper}}, {{v8_class}}::installPerContextEnabledMethods, {{parent_wrapper_type_info}}, {{wrapper_type_prototype}}, {{will_be_garbage_collected}} };
 
 namespace {{cpp_class}}V8Internal {
 
 template <typename T> void V8_USE(T) { }
 
 {# Attributes #}
-{% from 'attributes.cpp' import attribute_getter, attribute_getter_callback,
+{% from 'attributes.cpp' import constructor_getter_callback,
+       attribute_getter, attribute_getter_callback,
        attribute_setter, attribute_setter_callback
    with context %}
 {% for attribute in attributes if not attribute.constructor_type %}
 {% for world_suffix in attribute.world_suffixes %}
 {% if not attribute.has_custom_getter %}
 {{attribute_getter(attribute, world_suffix)}}
 {% endif %}
 {{attribute_getter_callback(attribute, world_suffix)}}
 {% if not attribute.is_read_only or attribute.put_forwards %}
 {% if not attribute.has_custom_setter %}
 {{attribute_setter(attribute, world_suffix)}}
 {% endif %}
 {{attribute_setter_callback(attribute, world_suffix)}}
 {% endif %}
 {% endfor %}
 {% endfor %}
 {% block constructor_getter %}{% endblock %}
+{% for attribute in attributes if attribute.needs_constructor_getter_callback %}
+{% for world_suffix in attribute.world_suffixes %}
+{{constructor_getter_callback(attribute, world_suffix)}}
+{% endfor %}
+{% endfor %}
 {% block replaceable_attribute_setter_and_callback %}{% endblock %}
 {% block security_check_functions %}{% endblock %}
 {# Methods #}
 {% from 'methods.cpp' import generate_method, overload_resolution_method,
        method_callback, origin_safe_method_getter, generate_constructor
        with context %}
 {% for method in methods %}
 {% for world_suffix in method.world_suffixes %}
 {% if not method.is_custom %}
 {{generate_method(method, world_suffix)}}
@@ skipping 52 matching lines @@
 {% block install_per_context_attributes %}{% endblock %}
 {% block install_per_context_methods %}{% endblock %}
 {% block to_active_dom_object %}{% endblock %}
 {% block to_event_target %}{% endblock %}
 {% block get_shadow_object_template %}{% endblock %}
 {% block wrap %}{% endblock %}
 {% block create_wrapper %}{% endblock %}
 {% block deref_object_and_to_v8_no_inline %}{% endblock %}
 } // namespace WebCore
 {% endfilter %}