Simplify V8 wrapper generation for Event objects

Source/bindings/modules/v8/ModuleBindingsInitializer.cpp

Index: Source/bindings/modules/v8/ModuleBindingsInitializer.cpp
diff --git a/Source/bindings/modules/v8/ModuleBindingsInitializer.cpp b/Source/bindings/modules/v8/ModuleBindingsInitializer.cpp
index 6c62a3a7a85b874faeca4412aa87a31ec797ebf3..19edd04fa936d62ecadbbce4adc492752f2d01c5 100644
--- a/Source/bindings/modules/v8/ModuleBindingsInitializer.cpp
+++ b/Source/bindings/modules/v8/ModuleBindingsInitializer.cpp
@@ -25,7 +25,13 @@ static v8::Handle<v8::Object> wrapForModuleEvent(Event* event, v8::Handle<v8::Ob
     ASSERT(event);
 
     String desiredInterface = event->interfaceName();
-    EVENT_MODULES_INTERFACES_FOR_EACH(TRY_TO_WRAP_WITH_INTERFACE)
+    EVENT_MODULES_INTERFACES_FOR_EACH(TRY_TO_WRAP_WITH_INTERFACE);
+
+    // Wrapping for core event types should have been tried before this
+    // function was called, so |event| should have been a module event type.
+    // If this ASSERT is hit, the event type was missing from both
+    // enumerations.
+    ASSERT_NOT_REACHED();
     return v8::Handle<v8::Object>();
 }