Make length property return useful values for DOM bindings functions

Source/bindings/tests/results/V8TestEventTarget.cpp

 /*
     This file is part of the WebKit open source project.
     This file has been generated by generate-bindings.pl. DO NOT MODIFY!
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 150 matching lines @@
 }
 
 static v8::Handle<v8::Value> dispatchEventMethodCallback(const v8::Arguments& args)
 {
     return TestEventTargetV8Internal::dispatchEventMethod(args);
 }
 
 } // namespace TestEventTargetV8Internal
 
 static const V8DOMConfiguration::BatchedMethod V8TestEventTargetMethods[] = {
-    {"item", TestEventTargetV8Internal::itemMethodCallback, 0},
-    {"namedItem", TestEventTargetV8Internal::namedItemMethodCallback, 0},
-    {"addEventListener", TestEventTargetV8Internal::addEventListenerMethodCallback, 0},
-    {"removeEventListener", TestEventTargetV8Internal::removeEventListenerMethodCallback, 0},
+    {"item", TestEventTargetV8Internal::itemMethodCallback, 0, 1},
+    {"namedItem", TestEventTargetV8Internal::namedItemMethodCallback, 0, 1},
+    {"addEventListener", TestEventTargetV8Internal::addEventListenerMethodCallback, 0, 2},
+    {"removeEventListener", TestEventTargetV8Internal::removeEventListenerMethodCallback, 0, 2},
 };
 
 static v8::Persistent<v8::FunctionTemplate> ConfigureV8TestEventTargetTemplate(v8::Persistent<v8::FunctionTemplate> desc, v8::Isolate* isolate, WrapperWorldType currentWorldType)
 {
     desc->ReadOnlyPrototype();
 
     v8::Local<v8::Signature> defaultSignature;
     defaultSignature = V8DOMConfiguration::configureTemplate(desc, "TestEventTarget", v8::Persistent<v8::FunctionTemplate>(), V8TestEventTarget::internalFieldCount,
         0, 0,
         V8TestEventTargetMethods, WTF_ARRAY_LENGTH(V8TestEventTargetMethods), isolate, currentWorldType);
@@ skipping 66 matching lines @@
     installPerContextProperties(wrapper, impl.get(), isolate);
     V8DOMWrapper::associateObjectWithWrapper(impl, &info, wrapper, isolate, hasDependentLifetime ? WrapperConfiguration::Dependent : WrapperConfiguration::Independent);
     return wrapper;
 }
 void V8TestEventTarget::derefObject(void* object)
 {
     static_cast<TestEventTarget*>(object)->deref();
 }
 
 } // namespace WebCore