Structured cloning: improve DataCloneError reporting.

Source/bindings/v8/custom/V8WorkerCustom.cpp

Index: Source/bindings/v8/custom/V8WorkerCustom.cpp
diff --git a/Source/bindings/v8/custom/V8WorkerCustom.cpp b/Source/bindings/v8/custom/V8WorkerCustom.cpp
index 19440578be31f36968a2b8c56baa1cd16a3b8fc3..6c09af45e1741815842bf3c3c8f7aa375060ca3e 100644
--- a/Source/bindings/v8/custom/V8WorkerCustom.cpp
+++ b/Source/bindings/v8/custom/V8WorkerCustom.cpp
@@ -50,18 +50,13 @@ void V8Worker::postMessageMethodCustom(const v8::FunctionCallbackInfo<v8::Value>
     ArrayBufferArray arrayBuffers;
     if (info.Length() > 1) {
         const int transferablesArgIndex = 1;
-        bool notASequence = false;
-        if (!extractTransferables(info[transferablesArgIndex], ports, arrayBuffers, notASequence, info.GetIsolate())) {
-            if (notASequence) {
-                exceptionState.throwTypeError(ExceptionMessages::notAnArrayTypeArgumentOrValue(transferablesArgIndex + 1));
-                exceptionState.throwIfNeeded();
-            }
+        if (!extractTransferables(info[transferablesArgIndex], transferablesArgIndex, ports, arrayBuffers, exceptionState, info.GetIsolate())) {
+            exceptionState.throwIfNeeded();
             return;
         }
     }
-    bool didThrow = false;
-    RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(info[0], &ports, &arrayBuffers, didThrow, info.GetIsolate());
-    if (didThrow)
+    RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(info[0], &ports, &arrayBuffers, exceptionState, info.GetIsolate());
+    if (exceptionState.throwIfNeeded())
         return;
     worker->postMessage(message.release(), &ports, exceptionState);
     exceptionState.throwIfNeeded();