Structured cloning: improve DataCloneError reporting.

Source/bindings/tests/results/V8SupportTestInterface.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 308 matching lines @@
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "supplementalMethod2", "SupportTestInterface", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(2, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     SupportTestInterface* imp = V8SupportTestInterface::toNative(info.Holder());
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, strArg, info[0]);
     if (info.Length() <= 1 || !info[1]->IsFunction()) {
-        throwTypeError(ExceptionMessages::failedToExecute("supplementalMethod2", "SupportTestInterface", "The callback provided as parameter 2 is not a function."), info.GetIsolate());
+        exceptionState.throwTypeError("The callback provided as parameter 2 is not a function.");
+        exceptionState.throwIfNeeded();
         return;
     }
     OwnPtr<TestObject> objArg = V8TestObject::create(v8::Handle<v8::Function>::Cast(info[1]), getExecutionContext());
     ExecutionContext* scriptContext = getExecutionContext();
     RefPtr<TestObj> result = SupportTestPartialInterface::supplementalMethod2(scriptContext, imp, strArg, objArg.release(), exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     v8SetReturnValue(info, result.release());
 }
 #endif // ENABLE(Condition11) || ENABLE(Condition12)
@@ skipping 164 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(SupportTestInterface* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore