Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

content/child/service_worker/service_worker_dispatcher.cc

Index: content/child/service_worker/service_worker_dispatcher.cc
diff --git a/content/child/service_worker/service_worker_dispatcher.cc b/content/child/service_worker/service_worker_dispatcher.cc
index 7c63e775116a573110dad8b94ea188774ed507d6..82a52fba45d3f5e12c30fcf9259cf7823009f1a5 100644
--- a/content/child/service_worker/service_worker_dispatcher.cc
+++ b/content/child/service_worker/service_worker_dispatcher.cc
@@ -116,7 +116,7 @@ ServiceWorkerDispatcher* ServiceWorkerDispatcher::ThreadSpecificInstance(
 
 void ServiceWorkerDispatcher::OnRegistered(int thread_id,
                                            int request_id,
-                                           int64 registration_id,
+                                           int handle_id,
                                            int64 version_id) {
   WebServiceWorkerProvider::WebServiceWorkerCallbacks* callbacks =
       pending_callbacks_.Lookup(request_id);
@@ -131,7 +131,7 @@ void ServiceWorkerDispatcher::OnRegistered(int thread_id,
   // duplicate registration. So for now we mint a new object each
   // time.
   scoped_ptr<WebServiceWorkerImpl> worker(
-      new WebServiceWorkerImpl(registration_id, version_id,
+      new WebServiceWorkerImpl(handle_id, version_id,

[michaeln, 2014/04/08 01:21:41]

in cases were the message doesn't get far and no WebServiceWorkerImpl is cons'd
up, we'll want to send the ServiceWorkerObjectDestroyed msg

so if the taskrunner returned by msgfilter::OverrideTaskRunner() failes to post
the task to dispatch the OnRegistered msg because the thread has been shutdown
already... when that happens.... objectDestroyed msg.

[kinuko, 2014/04/08 08:43:31]

Done.

                                thread_safe_sender_));
   callbacks->onSuccess(worker.release());
   pending_callbacks_.Remove(request_id);