v8binding: Don't allow author script to define indexed accessor prop.

third_party/WebKit/Source/bindings/templates/interface.h.tmpl

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 #ifndef {{v8_class}}_h
 #define {{v8_class}}_h
 
 {% for filename in header_includes %}
 #include "{{filename}}"
 {% endfor %}
 
@@ skipping 227 matching lines @@
   {% endif %}
   {% if named_property_getter and named_property_getter.is_enumerable %}
   {{exported}}static void namedPropertyQueryCallback(v8::Local<v8::Name>, const v8::PropertyCallbackInfo<v8::Integer>&);
   {% endif %}
   {% if named_property_getter and named_property_getter.is_enumerable %}
   {{exported}}static void namedPropertyEnumeratorCallback(const v8::PropertyCallbackInfo<v8::Array>&);
   {% endif %}
   {% if indexed_property_getter or named_property_getter %}
   {{exported}}static void indexedPropertyGetterCallback(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>&);
   {% endif %}
-  {% if indexed_property_setter or named_property_setter %}
+  {% if indexed_property_getter or named_property_setter %}
   {{exported}}static void indexedPropertySetterCallback(uint32_t index, v8::Local<v8::Value>, const v8::PropertyCallbackInfo<v8::Value>&);
   {% endif %}
   {% if indexed_property_deleter or named_property_deleter %}
   {{exported}}static void indexedPropertyDeleterCallback(uint32_t index, const v8::PropertyCallbackInfo<v8::Boolean>&);
   {% endif %}
+  {% if indexed_property_getter %}
+  {{exported}}static void indexedPropertyDefinerCallback(uint32_t index, const v8::PropertyDescriptor&, const v8::PropertyCallbackInfo<v8::Value>&);
+  {% endif %}
 
   {% if needs_runtime_enabled_installer %}
   {{exported if has_partial_interface else ''}}static void InstallRuntimeEnabledFeatures(
       v8::Isolate*,
       const DOMWrapperWorld& world,
       v8::Local<v8::Object> instance,
       v8::Local<v8::Object> prototype,
       v8::Local<v8::Function> interface);
 
   {% if has_partial_interface %}
@@ skipping 27 matching lines @@
 template <>
 struct V8TypeOf<{{cpp_class}}> {
   typedef {{v8_class}} Type;
 };
 
 }  // namespace blink
 
 #endif  // {{v8_class}}_h
 
 {% endfilter %}{# format_blink_cpp_source_code #}