Structured cloning: improve DataCloneError reporting.

Source/bindings/tests/results/V8TestInterfaceConstructor.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 66 matching lines @@
     if (UNLIKELY(info.Length() < 5)) {
         throwTypeError(ExceptionMessages::failedToExecute("Constructor", "TestInterfaceConstructor", ExceptionMessages::notEnoughArguments(5, info.Length())), info.GetIsolate());
         return;
     }
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "TestInterfaceConstructor", info.Holder(), info.GetIsolate());
     V8TRYCATCH_VOID(double, doubleArg, static_cast<double>(info[0]->NumberValue()));
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, stringArg, info[1]);
     V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[2], info.GetIsolate(), worldType(info.GetIsolate())) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[2])) : 0);
     V8TRYCATCH_VOID(Dictionary, dictionaryArg, Dictionary(info[3], info.GetIsolate()));
     if (!dictionaryArg.isUndefinedOrNull() && !dictionaryArg.isObject()) {
-        throwTypeError(ExceptionMessages::failedToConstruct("TestInterfaceConstructor", "parameter 4 ('dictionaryArg') is not an object."), info.GetIsolate());
+        exceptionState.throwTypeError("parameter 4 ('dictionaryArg') is not an object.");
+        exceptionState.throwIfNeeded();
         return;
     }
     V8TRYCATCH_VOID(Vector<String>, sequenceStringArg, toNativeArray<String>(info[4], 5, info.GetIsolate()));
     ExecutionContext* context = getExecutionContext();
     Document& document = *toDocument(getExecutionContext());
     RefPtr<TestInterfaceConstructor> impl = TestInterfaceConstructor::create(context, document, doubleArg, stringArg, testInterfaceEmptyArg, dictionaryArg, sequenceStringArg, exceptionState);
     v8::Handle<v8::Object> wrapper = info.Holder();
     if (exceptionState.throwIfNeeded())
         return;
 
@@ skipping 92 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterfaceConstructor* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore