Introduce ES6 iterator for DOM objects.

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 91 matching lines @@
 {% if not method.overload_index or method.overloads %}
 {# A single callback is generated for overloaded methods #}
 {{method_callback(method, world_suffix)}}
 {% endif %}
 {% if method.is_do_not_check_security %}
 {{origin_safe_method_getter(method, world_suffix)}}
 {% endif %}
 {% endfor %}
 {% endif %}
 {% endfor %}
+{% if is_iterable %}
+namespace symbol {
+{% for world_suffix in iterator_method.world_suffixes %}
+{{generate_method(iterator_method, world_suffix)}}
+{{method_callback(iterator_method, world_suffix, '::symbol')}}
+{% endfor %}
+} // namespace symbol
+{% endif %}
 {% block origin_safe_method_setter %}{% endblock %}
 {# Constructors #}
 {% for constructor in constructors %}
 {{generate_constructor(constructor)}}
 {% endfor %}
 {% block overloaded_constructor %}{% endblock %}
 {% block event_constructor %}{% endblock %}
 {# Special operations (methods) #}
 {% block indexed_property_getter %}{% endblock %}
 {% block indexed_property_getter_callback %}{% endblock %}
@@ skipping 38 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 %}