Service Worker: in Unregister, wait until after the active worker no longer controls a document

content/browser/service_worker/service_worker_unregister_job.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/browser/service_worker/service_worker_unregister_job.h"
 
+#include "base/memory/weak_ptr.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_job_coordinator.h"
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/browser/service_worker/service_worker_storage.h"
+#include "content/browser/service_worker/service_worker_utils.h"
+#include "content/browser/service_worker/service_worker_version.h"
 
 namespace content {
 
 typedef ServiceWorkerRegisterJobBase::RegistrationJobType RegistrationJobType;
 
 ServiceWorkerUnregisterJob::ServiceWorkerUnregisterJob(
     base::WeakPtr<ServiceWorkerContextCore> context,
     const GURL& pattern)
     : context_(context),
       pattern_(pattern),
-      weak_factory_(this) {}
+      is_promise_resolved_(false),
+      weak_factory_(this) {
+}
 
 ServiceWorkerUnregisterJob::~ServiceWorkerUnregisterJob() {}
 
 void ServiceWorkerUnregisterJob::AddCallback(
     const UnregistrationCallback& callback) {
   callbacks_.push_back(callback);
 }
 
 void ServiceWorkerUnregisterJob::Start() {
   context_->storage()->FindRegistrationForPattern(
@@ skipping 23 matching lines @@
     DCHECK(!registration);
     Complete(SERVICE_WORKER_OK);
     return;
   }
 
   if (status != SERVICE_WORKER_OK) {
     Complete(status);
     return;
   }
 
-  DCHECK(registration);
-  DeleteRegistration(registration);
-}
+  if (registration->is_uninstalling()) {
+    Complete(SERVICE_WORKER_OK);
+    return;
+  }
 
-void ServiceWorkerUnregisterJob::DeleteRegistration(
-    const scoped_refptr<ServiceWorkerRegistration>& registration) {
-  // TODO: Also doom installing version.
-  if (registration->waiting_version())
+  // "6. Set registration.uninstalling to true."
+  registration->set_uninstalling(true);
+
+  // TODO: "7. If registration.updatePromise is not null..."
+
+  // "8. If registration.installingWorker is not null, then:
+  if (registration->installing_version()) {
+    // 1. Terminate registration.installingWorker.
+    // 2. Run the [[UpdateState]] algorithm passing
+    // registration.installingWorker and 'redundant' as the arguments.
+    registration->installing_version()->Doom();
+    // 3. Set registration.installingWorker to null.
+    registration->UnsetVersion(registration->installing_version());
+  }
+
+  // "9. If registration.waitingWorker is not null, then:
+  if (registration->waiting_version()) {
+    // "1. Run the [[UpdateState]] algorithm passing registration.waitingWorker
+    // and 'redundant' as the arguments."
     registration->waiting_version()->Doom();
-  if (registration->active_version())
-    registration->active_version()->Doom();
+    // "2. Set registration.waitingWorker to null."
+    registration->UnsetVersion(registration->waiting_version());
+  }
 
-  context_->storage()->DeleteRegistration(
-      registration->id(),
-      registration->script_url().GetOrigin(),
-      base::Bind(&ServiceWorkerUnregisterJob::Complete,
-                 weak_factory_.GetWeakPtr()));
+  // "10. Resolve promise."
+  ResolvePromise(SERVICE_WORKER_OK);
+
+  registration->StartUninstall();
+  Complete(SERVICE_WORKER_OK);
 }
 
 void ServiceWorkerUnregisterJob::Complete(ServiceWorkerStatusCode status) {
   CompleteInternal(status);
   context_->job_coordinator()->FinishJob(pattern_, this);
 }
 
 void ServiceWorkerUnregisterJob::CompleteInternal(
     ServiceWorkerStatusCode status) {
+  if (!is_promise_resolved_)
+    ResolvePromise(status);
+}
+
+void ServiceWorkerUnregisterJob::ResolvePromise(
+    ServiceWorkerStatusCode status) {
+  DCHECK(!is_promise_resolved_);
+  is_promise_resolved_ = true;
   for (std::vector<UnregistrationCallback>::iterator it = callbacks_.begin();
        it != callbacks_.end();
        ++it) {
     it->Run(status);
   }
 }
 
 }  // namespace content