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

Source/bindings/core/v8/SerializedScriptValue.h

 /*
  * Copyright (C) 2009, 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 79 matching lines @@
     // of the HTML5 spec and generates exceptions as appropriate.
     // Returns true if the array was filled, or false if the passed value was not of an appropriate type.
     static bool extractTransferables(v8::Isolate*, v8::Local<v8::Value>, int, MessagePortArray&, ArrayBufferArray&, ExceptionState&);
 
     // Informs the V8 about external memory allocated and owned by this object. Large values should contribute
     // to GC counters to eventually trigger a GC, otherwise flood of postMessage() can cause OOM.
     // Ok to invoke multiple times (only adds memory once).
     // The memory registration is revoked automatically in destructor.
     void registerMemoryAllocatedWithCurrentScriptContext();
 
+    // Returns true if the value contains a transferable ArrayBuffer.
+    bool containsTransferableArrayBuffer() const;
+
 private:
     // The followings are private, but used by SerializedScriptValueFactory.
     enum StringDataMode {
         StringValue,
         WireData
     };
     typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray;
 
     SerializedScriptValue();
     explicit SerializedScriptValue(const String& wireData);
@@ skipping 11 matching lines @@
     OwnPtr<ArrayBufferContentsArray> m_arrayBufferContentsArray;
     BlobDataHandleMap m_blobDataHandles;
     intptr_t m_externallyAllocatedMemory;
 
     friend class SerializedScriptValueFactory;
 };
 
 } // namespace blink
 
 #endif // SerializedScriptValue_h