Enable sending MessagePorts to a different renderer (Blink side)

Source/core/events/MessageEvent.h

 /*
  * Copyright (C) 2007 Henry Mason (hmason@mac.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 43 matching lines @@
         return adoptRef(new MessageEvent);
     }
     static PassRefPtr<MessageEvent> create(PassOwnPtr<MessagePortArray> ports, const String& origin = String(), const String& lastEventId = String(), PassRefPtr<EventTarget> source = 0)
     {
         return adoptRef(new MessageEvent(origin, lastEventId, source, ports));
     }
     static PassRefPtr<MessageEvent> create(PassOwnPtr<MessagePortArray> ports, PassRefPtr<SerializedScriptValue> data, const String& origin = String(), const String& lastEventId = String(), PassRefPtr<EventTarget> source = 0)
     {
         return adoptRef(new MessageEvent(data, origin, lastEventId, source, ports));
     }
+    static PassRefPtr<MessageEvent> create(PassOwnPtr<MessagePortChannelArray> channels, PassRefPtr<SerializedScriptValue> data, const String& origin = String(), const String& lastEventId = String(), PassRefPtr<EventTarget> source = 0)
+    {
+        return adoptRef(new MessageEvent(data, origin, lastEventId, source, channels));
+    }
     static PassRefPtr<MessageEvent> create(const String& data, const String& origin = String())
     {
         return adoptRef(new MessageEvent(data, origin));
     }
     static PassRefPtr<MessageEvent> create(PassRefPtr<Blob> data, const String& origin = String())
     {
         return adoptRef(new MessageEvent(data, origin));
     }
     static PassRefPtr<MessageEvent> create(PassRefPtr<ArrayBuffer> data, const String& origin = String())
     {
         return adoptRef(new MessageEvent(data, origin));
     }
     static PassRefPtr<MessageEvent> create(const AtomicString& type, const MessageEventInit& initializer)
     {
         return adoptRef(new MessageEvent(type, initializer));
     }
     virtual ~MessageEvent();
 
     void initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, const String& origin, const String& lastEventId, DOMWindow* source, PassOwnPtr<MessagePortArray>);
     void initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, DOMWindow* source, PassOwnPtr<MessagePortArray>);
 
     const String& origin() const { return m_origin; }
     const String& lastEventId() const { return m_lastEventId; }
     EventTarget* source() const { return m_source.get(); }
     MessagePortArray ports() const { return m_ports ? *m_ports : MessagePortArray(); }
+    MessagePortChannelArray channels() const { return m_channels ? *m_channels : MessagePortChannelArray(); }
 
     virtual const AtomicString& interfaceName() const;
 
     enum DataType {
         DataTypeScriptValue,
         DataTypeSerializedScriptValue,
         DataTypeString,
         DataTypeBlob,
         DataTypeArrayBuffer
     };
     DataType dataType() const { return m_dataType; }
     SerializedScriptValue* dataAsSerializedScriptValue() const { ASSERT(m_dataType == DataTypeScriptValue || m_dataType == DataTypeSerializedScriptValue); return m_dataAsSerializedScriptValue.get(); }
     String dataAsString() const { ASSERT(m_dataType == DataTypeString); return m_dataAsString; }
     Blob* dataAsBlob() const { ASSERT(m_dataType == DataTypeBlob); return m_dataAsBlob.get(); }
     ArrayBuffer* dataAsArrayBuffer() const { ASSERT(m_dataType == DataTypeArrayBuffer); return m_dataAsArrayBuffer.get(); }
 
     void setSerializedData(PassRefPtr<SerializedScriptValue> data)
     {
         ASSERT(!m_dataAsSerializedScriptValue);
         m_dataAsSerializedScriptValue = data;
     }
 
+    void entangleMessagePorts(ExecutionContext*);
+
 private:
     MessageEvent();
     MessageEvent(const AtomicString&, const MessageEventInit&);
     MessageEvent(const String& origin, const String& lastEventId, PassRefPtr<EventTarget> source, PassOwnPtr<MessagePortArray>);
     MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtr<EventTarget> source, PassOwnPtr<MessagePortArray>);
+    MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtr<EventTarget> source, PassOwnPtr<MessagePortChannelArray>);
 
     explicit MessageEvent(const String& data, const String& origin);
     explicit MessageEvent(PassRefPtr<Blob> data, const String& origin);
     explicit MessageEvent(PassRefPtr<ArrayBuffer> data, const String& origin);
 
     DataType m_dataType;
     RefPtr<SerializedScriptValue> m_dataAsSerializedScriptValue;
     String m_dataAsString;
     RefPtr<Blob> m_dataAsBlob;
     RefPtr<ArrayBuffer> m_dataAsArrayBuffer;
     String m_origin;
     String m_lastEventId;
     RefPtr<EventTarget> m_source;
+    // m_ports are the MessagePorts in an engtangled state, and m_channels are
+    // the MessageChannels in a disentangled state. Only one of them can be
+    // non-empty at a time. entangleMessagePorts() moves between the states.
     OwnPtr<MessagePortArray> m_ports;
+    OwnPtr<MessagePortChannelArray> m_channels;
 };
 
 } // namespace WebCore
 
 #endif // MessageEvent_h