Fix V8 bindings for named constructors to set prototype object correctly

third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl

Index: third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
diff --git a/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl b/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
index 7550a07909499b173d56cb0f3785aa515d5d03f8..f940e18f75e7efba06f9a80fb24b7122e9c35f36 100644
--- a/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
+++ b/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
@@ -426,7 +426,9 @@ const v8::FunctionCallbackInfo<v8::Value>& info
 {% set getter_callback =
        '%sV8Internal::%sConstructorGetterCallback' % (cpp_class_or_partial, attribute.name)
        if attribute.needs_constructor_getter_callback else
-       'v8ConstructorAttributeGetter' %}
+       ('V8%s::NamedConstructorAttributeGetter' % (attribute.constructor_type)
+        if attribute.is_named_constructor else
+        'v8ConstructorAttributeGetter') %}
 {% set setter_callback = '0' %}
 {% else %}{# regular attributes #}
 {% set getter_callback = '%sV8Internal::%sAttributeGetterCallback' %