Add [CEReactions] IDL attributes for Custom Elements V1

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

Index: third_party/WebKit/Source/bindings/templates/attributes.cpp
diff --git a/third_party/WebKit/Source/bindings/templates/attributes.cpp b/third_party/WebKit/Source/bindings/templates/attributes.cpp
index a63ee63eff341fda31ad43dbecd046cb4db4af98..ccd092281c5264e69acc00c36d0013f130c65466 100644
--- a/third_party/WebKit/Source/bindings/templates/attributes.cpp
+++ b/third_party/WebKit/Source/bindings/templates/attributes.cpp
@@ -388,6 +388,9 @@ const v8::FunctionCallbackInfo<v8::Value>& info
         contextData->activityLogger()->logSetter("{{interface_name}}.{{attribute.name}}", v8Value);
     }
     {% endif %}
+    {% if attribute.is_ce_reactions %}
+    CEReactionsScope ceReactionsScope;
+    {% endif %}
     {% if attribute.is_custom_element_callbacks or attribute.is_reflect %}

[Yuki, 2016/06/07 08:16:57]

[CEReactions] is only supported for V1?

If so, line 393 and 394 can be combined to {% elif ...V0... %} ?

This seems it's possible that both of CEReactionsScope and CallbackDeliveryScope
are effective.

[kojii, 2016/06/07 09:56:36]

[CEReactions] supports only V1, but since we support both V0 and V1 at this
moment and thus an element could be either V0 or V1, we need both scopes until
we deprecate V0.

     V0CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     {% endif %}