Adding slightly clearer separation between SW and EmbeddedWorker (still incomplete)

content/browser/service_worker/service_worker_dispatcher_host.cc

Index: content/browser/service_worker/service_worker_dispatcher_host.cc
diff --git a/content/browser/service_worker/service_worker_dispatcher_host.cc b/content/browser/service_worker/service_worker_dispatcher_host.cc
index 8c9f867cf7fa6e92b6243218e92639b30f9ee241..8fe3ebe6adbea7608fed708445cec34228bbaa3e 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host.cc
+++ b/content/browser/service_worker/service_worker_dispatcher_host.cc
@@ -77,6 +77,8 @@ bool ServiceWorkerDispatcherHost::OnMessageReceived(
                         OnWorkerStarted)
     IPC_MESSAGE_HANDLER(EmbeddedWorkerHostMsg_WorkerStopped,
                         OnWorkerStopped)
+    IPC_MESSAGE_HANDLER(EmbeddedWorkerHostMsg_SendMessageToBrowser,
+                        OnSendMessageToBrowser)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -193,6 +195,15 @@ void ServiceWorkerDispatcherHost::OnWorkerStopped(int embedded_worker_id) {
       render_process_id_, embedded_worker_id);
 }
 
+void ServiceWorkerDispatcherHost::OnSendMessageToBrowser(
+    int embedded_worker_id,
+    const IPC::Message& message) {
+  if (!context_)
+    return;
+  context_->embedded_worker_registry()->OnSendMessageToBrowser(
+      embedded_worker_id, message);
+}
+
 void ServiceWorkerDispatcherHost::UnregistrationComplete(
     int32 thread_id,
     int32 request_id,