Generate a bit less code to handle failed arity checks.

Source/bindings/tests/results/V8TestNamedConstructor.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 77 matching lines @@
         return;
     }
 
     Document* document = currentDocument();
     ASSERT(document);
 
     // Make sure the document is added to the DOM Node map. Otherwise, the TestNamedConstructor instance
     // may end up being the only node in the map and get garbage-collected prematurely.
     toV8(document, info.Holder(), info.GetIsolate());
 
+    ExceptionState exceptionState(ExceptionState::ConstructionContext, "TestNamedConstructor", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
-        throwTypeError(ExceptionMessages::failedToExecute("NamedConstructor", "TestNamedConstructor", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
+        exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
+        exceptionState.throwIfNeeded();
         return;
     }
-    ExceptionState exceptionState(info.Holder(), info.GetIsolate());
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, str1, info[0]);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, str2, info[1]);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, str3, argumentOrNull(info, 2));
 
     RefPtr<TestNamedConstructor> impl = TestNamedConstructor::createForJSConstructor(*document, str1, str2, str3, exceptionState);
     v8::Handle<v8::Object> wrapper = info.Holder();
     if (exceptionState.throwIfNeeded())
         return;
 
     V8DOMWrapper::associateObjectWithWrapper<V8TestNamedConstructor>(impl.release(), &V8TestNamedConstructorConstructor::wrapperTypeInfo, wrapper, info.GetIsolate(), WrapperConfiguration::Dependent);
@@ skipping 100 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestNamedConstructor* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore