IDL: Support [DeprecateAs] and [MeasureAs] on constants

Source/bindings/templates/interface_base.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by {{code_generator}}. DO NOT MODIFY!
 
 #include "config.h"
 {% filter conditional(conditional_string) %}
 #include "{{v8_class}}.h"
 
@@ skipping 19 matching lines @@
 // This static member must be declared by DEFINE_WRAPPERTYPEINFO in {{cpp_class}}.h.
 // For details, see the comment of DEFINE_WRAPPERTYPEINFO in
 // bindings/core/v8/ScriptWrappable.h.
 const WrapperTypeInfo& {{cpp_class}}::s_wrapperTypeInfo = {{v8_class}}::wrapperTypeInfo;
 
 {% endif %}
 namespace {{cpp_class}}V8Internal {
 
 template <typename T> void V8_USE(T) { }
 
+{# Constants #}
+{% from 'constants.cpp' import constant_getter_callback
+       with context %}
+{% for constant in special_getter_constants %}
+{{constant_getter_callback(constant)}}
+{% endfor %}
 {# Attributes #}
 {% from 'attributes.cpp' import constructor_getter_callback,
        attribute_getter, attribute_getter_callback,
        attribute_setter, attribute_setter_callback,
        attribute_getter_implemented_in_private_script,
        attribute_setter_implemented_in_private_script
        with context %}
 {% for attribute in attributes if not attribute.constructor_type %}
 {% if attribute.should_be_exposed_to_script %}
 {% for world_suffix in attribute.world_suffixes %}
@@ skipping 97 matching lines @@
 {{method_implemented_in_private_script(method)}}
 {% endfor %}
 {% for attribute in attributes if attribute.is_implemented_in_private_script %}
 {{attribute_getter_implemented_in_private_script(attribute)}}
 {% if not attribute.is_read_only or attribute.put_forwards %}
 {{attribute_setter_implemented_in_private_script(attribute)}}
 {% endif %}
 {% endfor %}
 } // namespace blink
 {% endfilter %}