Disallow wrapper creation from visitDOMWrapper

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 5da47a89b6533626e3f90a0aa2fd535dfe2c64cc..ce5dce512376cff0c350e05bf81921e48802faf9 100644
--- a/Source/bindings/templates/interface.cpp
+++ b/Source/bindings/templates/interface.cpp
@@ -596,8 +596,7 @@ void {{v8_class}}::visitDOMWrapper(v8::Isolate* isolate, ScriptWrappable* script
     {% for set_wrapper_reference_to in set_wrapper_reference_to_list %}
     {{set_wrapper_reference_to.cpp_type}} {{set_wrapper_reference_to.name}} = impl->{{set_wrapper_reference_to.name}}();
     if ({{set_wrapper_reference_to.name}}) {
-        if (!DOMDataStore::containsWrapper({{set_wrapper_reference_to.name}}, isolate))
-            {{set_wrapper_reference_to.name}}->wrap(creationContext, isolate);

[haraken, 2015/02/16 03:56:49]

Another idea would be just to skip creating a wrapper (and setting a reference)
if the target wrapper does not exist. Will it work?

[kouhei (in TOK), 2015/02/16 04:03:24]

Wouldn't it be too fragile? I prefer an ASSERT here.

+        ASSERT(DOMDataStore::containsWrapper({{set_wrapper_reference_to.name}}, isolate));
         DOMDataStore::setWrapperReference(wrapper, {{set_wrapper_reference_to.name}}, isolate);
     }
     {% endfor %}