ServiceWorker: Let dtor of SWRegistration work in the shutdown sequence

content/browser/service_worker/service_worker_registration.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_registration.h"
 
 #include <vector>
 
 #include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
@@ skipping 31 matching lines @@
       resources_total_size_bytes_(0),
       context_(context),
       task_runner_(base::ThreadTaskRunnerHandle::Get()) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK_NE(kInvalidServiceWorkerRegistrationId, registration_id);
   DCHECK(context_);
   context_->AddLiveRegistration(this);
 }
 
 ServiceWorkerRegistration::~ServiceWorkerRegistration() {
-  // Can be false during shutdown, in which case the DCHECK_CURRENTLY_ON below
-  // would cry.
-  if (!BrowserThread::IsThreadInitialized(BrowserThread::IO))
-    return;
-
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(!listeners_.might_have_observers());
   if (context_)
     context_->RemoveLiveRegistration(registration_id_);
   if (active_version())
     active_version()->RemoveListener(this);
 }
 
 ServiceWorkerVersion* ServiceWorkerRegistration::GetNewestVersion() const {
   if (installing_version())
@@ skipping 448 matching lines @@
   if (!context_) {
     callback.Run(SERVICE_WORKER_ERROR_ABORT);
     return;
   }
   context_->storage()->NotifyDoneInstallingRegistration(
       this, version.get(), status);
   callback.Run(status);
 }
 
 }  // namespace content