Step two of optionally sending messages to/from message ports as base::Value.

content/browser/service_worker/service_worker_provider_host.h

Index: content/browser/service_worker/service_worker_provider_host.h
diff --git a/content/browser/service_worker/service_worker_provider_host.h b/content/browser/service_worker/service_worker_provider_host.h
index 798b7d4d6297aba88529799da5749f3efc881618..a4f370418c34ae6b2b80f995cb91a03e207cd650 100644
--- a/content/browser/service_worker/service_worker_provider_host.h
+++ b/content/browser/service_worker/service_worker_provider_host.h
@@ -143,8 +143,9 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
   bool IsContextAlive();
 
   // Dispatches message event to the document.
-  void PostMessage(const base::string16& message,
-                   const std::vector<int>& sent_message_port_ids);
+  void PostMessage(
+      const base::string16& message,
+      const std::vector<TransferredMessagePort>& sent_message_ports);
 
   // Activates the WebContents associated with
   // { render_process_id_, render_frame_id_ }.