WebMessaging: Show a warning when MessagePort attempts to send a transferable ArrayBuffer

Source/bindings/core/v8/SerializedScriptValue.cpp

 /*
  * Copyright (C) 2010 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 220 matching lines @@
 }
 
 void SerializedScriptValue::registerMemoryAllocatedWithCurrentScriptContext()
 {
     if (m_externallyAllocatedMemory)
         return;
     m_externallyAllocatedMemory = static_cast<intptr_t>(m_data.length());
     v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(m_externallyAllocatedMemory);
 }
 
+bool SerializedScriptValue::containsTransferableArrayBuffer()
+{
+    return m_arrayBufferContentsArray && !m_arrayBufferContentsArray->isEmpty();
+}
+
 SerializedScriptValue::~SerializedScriptValue()
 {
     // If the allocated memory was not registered before, then this class is likely
     // used in a context other then Worker's onmessage environment and the presence of
     // current v8 context is not guaranteed. Avoid calling v8 then.
     if (m_externallyAllocatedMemory) {
         ASSERT(v8::Isolate::GetCurrent());
         v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(-m_externallyAllocatedMemory);
     }
 }
 
 void SerializedScriptValue::transferArrayBuffers(v8::Isolate* isolate, ArrayBufferArray& arrayBuffers, ExceptionState& exceptionState)
 {
     m_arrayBufferContentsArray = createArrayBuffers(isolate, arrayBuffers, exceptionState);
 }
 
 } // namespace blink