Structured cloning: improve DataCloneError reporting.

Source/bindings/tests/results/V8SupportTestInterface.cpp

Index: Source/bindings/tests/results/V8SupportTestInterface.cpp
diff --git a/Source/bindings/tests/results/V8SupportTestInterface.cpp b/Source/bindings/tests/results/V8SupportTestInterface.cpp
index 953e86faf7c47f9955b7f7ae1c00577de386b67e..be1dd03b067f647002f87caea064b08089e20351 100644
--- a/Source/bindings/tests/results/V8SupportTestInterface.cpp
+++ b/Source/bindings/tests/results/V8SupportTestInterface.cpp
@@ -326,7 +326,8 @@ static void supplementalMethod2Method(const v8::FunctionCallbackInfo<v8::Value>&
     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());