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

content/browser/service_worker/service_worker_storage.cc

Index: content/browser/service_worker/service_worker_storage.cc
diff --git a/content/browser/service_worker/service_worker_storage.cc b/content/browser/service_worker/service_worker_storage.cc
index 83e8c798fb3f5ea20465a51e8f1c23d631662876..391a7b653a4dfb7764e63bbd0dfcc1c9b8ec4b45 100644
--- a/content/browser/service_worker/service_worker_storage.cc
+++ b/content/browser/service_worker/service_worker_storage.cc
@@ -329,6 +329,22 @@ void ServiceWorkerStorage::FindRegistrationForPattern(
                      weak_factory_.GetWeakPtr(), scope, callback)));
 }
 
+scoped_refptr<ServiceWorkerRegistration>
+ServiceWorkerStorage::GetUninstallingRegistration(const GURL& scope) {
+  if (state_ != INITIALIZED || !context_)
+    return NULL;
+  for (RegistrationRefsById::const_iterator it =
+           uninstalling_registrations_.begin();
+       it != uninstalling_registrations_.end();
+       ++it) {
+    if (it->second->pattern() == scope) {
+      DCHECK(it->second->is_uninstalling());
+      return it->second;
+    }
+  }
+  return NULL;
+}
+
 void ServiceWorkerStorage::FindRegistrationForId(
     int64 registration_id,
     const GURL& origin,
@@ -420,7 +436,7 @@ void ServiceWorkerStorage::StoreRegistration(
   data.has_fetch_handler = true;
   data.version_id = version->version_id();
   data.last_update_check = base::Time::Now();
-  data.is_active = false;  // initially stored in the waiting state
+  data.is_active = (version == registration->active_version());
 
   ResourceList resources;
   version->script_cache_map()->GetResources(&resources);
@@ -608,6 +624,16 @@ void ServiceWorkerStorage::NotifyDoneInstallingRegistration(
   }
 }
 
+void ServiceWorkerStorage::NotifyUninstallingRegistration(
+    ServiceWorkerRegistration* registration) {
+  uninstalling_registrations_[registration->id()] = registration;
+}
+
+void ServiceWorkerStorage::NotifyDoneUninstallingRegistration(
+    ServiceWorkerRegistration* registration) {
+  uninstalling_registrations_.erase(registration->id());
+}
+
 void ServiceWorkerStorage::Disable() {
   state_ = DISABLED;
   if (disk_cache_)
@@ -773,7 +799,7 @@ void ServiceWorkerStorage::DidFindRegistrationForId(
   }
 
   if (status == ServiceWorkerDatabase::STATUS_ERROR_NOT_FOUND) {
-    // TODO(nhiroki): Find a registration in |installing_registrations_|.
+    // TODO(nhiroki): Find a registration in |installing_registrations|.
     callback.Run(DatabaseStatusToStatusCode(status),
                  scoped_refptr<ServiceWorkerRegistration>());
     return;