Blink JavaScript shared memory prototype.

Source/bindings/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 2904 matching lines @@
         if (visited.contains(arrayBuffers[i].get()))
             continue;
         visited.add(arrayBuffers[i].get());
 
         bool result = arrayBuffers[i]->transfer(contents->at(i));
         if (!result) {
             exceptionState.throwDOMException(DataCloneError, "ArrayBuffer at index " + String::number(i) + " could not be transferred.");
             return nullptr;
         }
 
-        neuterArrayBufferInAllWorlds(arrayBuffers[i].get());
+        if (!arrayBuffers[i]->isShared()) {
+            neuterArrayBufferInAllWorlds(arrayBuffers[i].get());
+        }
     }
     return contents.release();
 }
 
 SerializedScriptValue::SerializedScriptValue(v8::Handle<v8::Value> value, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, WebBlobInfoArray* blobInfo, ExceptionState& exceptionState, v8::Isolate* isolate)
     : m_externallyAllocatedMemory(0)
 {
     Writer writer;
     Serializer::Status status;
     String errorMessage;
@@ skipping 120 matching lines @@
     // 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);
     }
 }
 
 } // namespace WebCore