Add [CEReactions] IDL attributes for Custom Elements V1

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

Index: third_party/WebKit/Source/bindings/templates/methods.cpp
diff --git a/third_party/WebKit/Source/bindings/templates/methods.cpp b/third_party/WebKit/Source/bindings/templates/methods.cpp
index 034343e174b10ade3609fecaec62d18fb43b24e5..7da292101268e045e0ba23b35b348663ed1aa436 100644
--- a/third_party/WebKit/Source/bindings/templates/methods.cpp
+++ b/third_party/WebKit/Source/bindings/templates/methods.cpp
@@ -512,6 +512,9 @@ static void {{method.name}}MethodCallback{{world_suffix}}(const v8::FunctionCall
         contextData->activityLogger()->logMethod("{{interface_name}}.{{method.name}}", info.Length(), loggerArgs.data());
     }
     {% endif %}
+    {% if method.is_ce_reactions %}
+    CEReactionsScope ceReactionsScope;
+    {% endif %}
     {% if method.is_custom %}
     {{v8_class}}::{{method.name}}MethodCustom(info);
     {% elif method.is_post_message %}