Implement ServiceWorkerVersion::SendMessage() (for dispatching events etc)

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 "content/common/service_worker/service_worker_messages.h"
 #include "content/renderer/service_worker/embedded_worker_context_client.h"
 #include "ipc/ipc_message.h"
 #include "third_party/WebKit/public/web/WebServiceWorkerContextProxy.h"
 
 namespace content {
 
 ServiceWorkerScriptContext::ServiceWorkerScriptContext(
     EmbeddedWorkerContextClient* embedded_context,
     blink::WebServiceWorkerContextProxy* proxy)
     : embedded_context_(embedded_context),
-      proxy_(proxy) {
+      proxy_(proxy),
+      current_request_id_(-1) {

[jsbell, 2014/02/04 23:29:03]

Ditto, -1 as magic number. Can you use an enum/constant?

 }
 
 ServiceWorkerScriptContext::~ServiceWorkerScriptContext() {}
 
 void ServiceWorkerScriptContext::OnMessageReceived(
+    int request_id,
     const IPC::Message& message) {
+  DCHECK_EQ(-1, current_request_id_);
+  current_request_id_ = request_id;
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ServiceWorkerScriptContext, message)
     IPC_MESSAGE_HANDLER(ServiceWorkerMsg_FetchEvent, OnFetchEvent)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   DCHECK(handled);
+  current_request_id_ = -1;
 }
 
-void ServiceWorkerScriptContext::Send(const IPC::Message& message) {
-  embedded_context_->SendMessageToBrowser(message);
+void ServiceWorkerScriptContext::Send(int request_id,
+                                      const IPC::Message& message) {
+  embedded_context_->SendMessageToBrowser(request_id, message);
 }
 
 void ServiceWorkerScriptContext::OnFetchEvent(
     const ServiceWorkerFetchRequest& request) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace content