Register a Service Worker when an extension is enabled.

content/browser/service_worker/service_worker_register_job.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/browser/service_worker/service_worker_register_job.h"
 
 #include <vector>
 
 #include "content/browser/service_worker/service_worker_job_coordinator.h"
 #include "content/browser/service_worker/service_worker_registration.h"
@@ skipping 126 matching lines @@
   pending_version_->StartWorker(base::Bind(&ServiceWorkerRegisterJob::Complete,
                                            weak_factory_.GetWeakPtr()));
 
   // TODO(falken): Don't set the active version until just before
   // the activate event is dispatched.
   pending_version_->SetStatus(ServiceWorkerVersion::ACTIVE);
   registration_->set_active_version(pending_version_);
 }
 
 void ServiceWorkerRegisterJob::Complete(ServiceWorkerStatusCode status) {
+  if (status == SERVICE_WORKER_OK)
+    DCHECK(registration_);
+  else
+    registration_ = NULL;
+
   for (std::vector<RegistrationCallback>::iterator it = callbacks_.begin();
        it != callbacks_.end();
        ++it) {
     it->Run(status, registration_);
   }
   coordinator_->FinishJob(pattern_, this);
 }
 
 }  // namespace content