Add WorkerScriptLoaded message to support attaching DevTools while starting ServiceWorker.

content/renderer/service_worker/embedded_worker_context_client.cc

 // Copyright 2013 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/embedded_worker_context_client.h"
 
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/pickle.h"
 #include "base/threading/thread_local.h"
@@ skipping 114 matching lines @@
     blink::WebServiceWorkerClientsCallbacks* callbacks) {
   DCHECK(script_context_);
   script_context_->GetClientDocuments(callbacks);
 }
 
 void EmbeddedWorkerContextClient::workerContextFailedToStart() {
   DCHECK(main_thread_proxy_->RunsTasksOnCurrentThread());
   DCHECK(!script_context_);
 
   RenderThreadImpl::current()->embedded_worker_dispatcher()->
       WorkerContextDestroyed(embedded_worker_id_);

[kinuko, 2014/05/02 07:27:10]

While you're there... it might be better to send WorkerScriptLoadFailed here?
(For symmetricity, and also we'll probably want to distinguish 'just stopped'
status and 'failed to load' status in a near future. For now it can just
dispatch OnStopped in the browser side, with TODO comment to handle it better)

[horo, 2014/05/02 08:04:56]

Done.

 }
 
 void EmbeddedWorkerContextClient::workerContextStarted(
     blink::WebServiceWorkerContextProxy* proxy) {
   DCHECK(!worker_task_runner_);
   worker_task_runner_ = new WorkerThreadTaskRunner(
       WorkerTaskRunner::Instance()->CurrentWorkerId());
   DCHECK_NE(0, WorkerTaskRunner::Instance()->CurrentWorkerId());
   DCHECK(g_worker_client_tls.Pointer()->Get() == NULL);
   DCHECK(!script_context_);
   g_worker_client_tls.Pointer()->Set(this);
   script_context_.reset(new ServiceWorkerScriptContext(this, proxy));
 
+  Send(new EmbeddedWorkerHostMsg_WorkerScriptLoaded(embedded_worker_id_));
+
   // Schedule a task to send back WorkerStarted asynchronously,
   // so that at the time we send it we can be sure that the worker
   // script has been evaluated and worker run loop has been started.
   worker_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&EmbeddedWorkerContextClient::SendWorkerStarted,
                  weak_factory_.GetWeakPtr()));
 }
 
 void EmbeddedWorkerContextClient::willDestroyWorkerContext() {
@@ skipping 118 matching lines @@
 }
 
 void EmbeddedWorkerContextClient::SendWorkerStarted() {
   DCHECK(worker_task_runner_->RunsTasksOnCurrentThread());
   Send(new EmbeddedWorkerHostMsg_WorkerStarted(
       WorkerTaskRunner::Instance()->CurrentWorkerId(),
       embedded_worker_id_));
 }
 
 }  // namespace content