Introduce ES6 iterator for DOM objects.

Source/bindings/templates/interface.cpp

Index: Source/bindings/templates/interface.cpp
diff --git a/Source/bindings/templates/interface.cpp b/Source/bindings/templates/interface.cpp
index 163a2f6de7110ed691a4326817848c80ba87c4b5..2690307280cf9859e9f729719bee5d9868d89bd5 100644
--- a/Source/bindings/templates/interface.cpp
+++ b/Source/bindings/templates/interface.cpp
@@ -978,6 +978,10 @@ static void install{{v8_class}}Template(v8::Handle<v8::FunctionTemplate> functio
            if named_property_getter.is_enumerable else '0' %}
     functionTemplate->{{set_on_template}}()->SetNamedPropertyHandler({{named_property_getter_callback}}, {{named_property_setter_callback}}, {{named_property_query_callback}}, {{named_property_deleter_callback}}, {{named_property_enumerator_callback}});
     {% endif %}
+    {% if is_iterable %}
+    static const V8DOMConfiguration::SymbolKeyedMethodConfiguration symbolIteratorConfiguration = { v8::Symbol::GetIterator, {{cpp_class}}V8Internal::symbol::iteratorMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts };

[haraken, 2014/08/21 16:15:58]

You'll need to support iteratorMethodCallbackForMainWorld as well.

That said, I'm OK to completely drop the support for per-world-bindings for
iterator methods. We've been trying to decrease per-world-bindings and don't
have a plan to support it for new features.

[haraken, 2014/08/21 16:15:58]

Don't mix "SymbolKeyedMethodConfiguration" and
"symbolIteratorMethodConfiguration" :)

[yhirano, 2014/08/25 06:09:26]

Done.

+    V8DOMConfiguration::installMethod(prototypeTemplate, defaultSignature, v8::DontDelete, symbolIteratorConfiguration, isolate);
+    {% endif %}
     {# End special operations #}
     {% if has_custom_legacy_call_as_function %}
     functionTemplate->InstanceTemplate()->SetCallAsFunctionHandler({{v8_class}}::legacyCallCustom);