Optionally have MessagePort pass data as base::Value, part 1.

content/renderer/service_worker/service_worker_script_context.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/service_worker/service_worker_script_context.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/trace_event/trace_event.h"
 #include "content/child/notifications/notification_data_conversions.h"
@@ skipping 28 matching lines @@
       routing_id, client_id, message,
       WebMessagePortChannelImpl::ExtractMessagePortIDs(channels.release())));
 }
 
 void SendCrossOriginMessageToClientOnMainThread(
     ThreadSafeSender* sender,
     int message_port_id,
     const base::string16& message,
     scoped_ptr<blink::WebMessagePortChannelArray> channels) {
   sender->Send(new MessagePortHostMsg_PostMessage(
-      message_port_id, message,
-      WebMessagePortChannelImpl::ExtractMessagePortIDs(channels.release())));
+      message_port_id,
+      MessagePortMessage(message),
+                         WebMessagePortChannelImpl::ExtractMessagePortIDs(
+                             channels.release())));
 }
 
 blink::WebURLRequest::FetchRequestMode GetBlinkFetchRequestMode(
     FetchRequestMode mode) {
   return static_cast<blink::WebURLRequest::FetchRequestMode>(mode);
 }
 
 blink::WebURLRequest::FetchCredentialsMode GetBlinkFetchCredentialsMode(
     FetchCredentialsMode credentials_mode) {
   return static_cast<blink::WebURLRequest::FetchCredentialsMode>(
@@ skipping 522 matching lines @@
       new blink::WebServiceWorkerError(error_type, message));
   callbacks->onError(error.release());
   pending_claim_clients_callbacks_.Remove(request_id);
 }
 
 void ServiceWorkerScriptContext::OnPing() {
   Send(new ServiceWorkerHostMsg_Pong(GetRoutingID()));
 }
 
 }  // namespace content