Implement ServiceWorker::postMessage() [Blink]

Source/core/dom/MessagePort.cpp

Index: Source/core/dom/MessagePort.cpp
diff --git a/Source/core/dom/MessagePort.cpp b/Source/core/dom/MessagePort.cpp
index b5e171446d784b353627a8ccaf637dd3deeab2eb..99aab7c6fdafd35bf9d9604958060477727b281f 100644
--- a/Source/core/dom/MessagePort.cpp
+++ b/Source/core/dom/MessagePort.cpp
@@ -87,13 +87,33 @@ void MessagePort::postMessage(PassRefPtr<SerializedScriptValue> message, const M
     }
 
     blink::WebString messageString = message->toWireString();
-    blink::WebMessagePortChannelArray* webChannels = 0;
+    OwnPtr<blink::WebMessagePortChannelArray> webChannels = toWebMessagePortChannelArray(channels.release());
+    m_entangledChannel->postMessage(messageString, webChannels.leakPtr());
+}
+
+// static
+PassOwnPtr<blink::WebMessagePortChannelArray> MessagePort::toWebMessagePortChannelArray(PassOwnPtr<MessagePortChannelArray> channels)
+{
+    OwnPtr<blink::WebMessagePortChannelArray> webChannels;
     if (channels && channels->size()) {
-        webChannels = new blink::WebMessagePortChannelArray(channels->size());
+        webChannels = adoptPtr(new blink::WebMessagePortChannelArray(channels->size()));
         for (size_t i = 0; i < channels->size(); ++i)
             (*webChannels)[i] = (*channels)[i].leakPtr();
     }
-    m_entangledChannel->postMessage(messageString, webChannels);
+    return webChannels.release();
+}
+
+// static
+PassOwnPtr<MessagePortArray> MessagePort::toMessagePortArray(ExecutionContext* context, const blink::WebMessagePortChannelArray& webChannels)
+{
+    OwnPtr<MessagePortArray> ports;
+    if (!webChannels.isEmpty()) {
+        OwnPtr<MessagePortChannelArray> channels = adoptPtr(new MessagePortChannelArray(webChannels.size()));
+        for (size_t i = 0; i < webChannels.size(); ++i)
+            (*channels)[i] = adoptPtr(webChannels[i]);
+        ports = MessagePort::entanglePorts(*context, channels.release());
+    }
+    return ports.release();
 }
 
 PassOwnPtr<blink::WebMessagePortChannel> MessagePort::disentangle()