[ServiceWorker] Check state in WebServiceWorkerRegistrationImpl::SetVersionAttributes

BUG=769236

Change-Id: Ifeee539a033b93ccee3e2223e7eb36b266385911
Reviewed-on: https://chromium-review.googlesource.com/748905Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Han Leon <leon.han@intel.com>
Cr-Commit-Position: refs/heads/master@{#513115}

content/renderer/service_worker/web_service_worker_registration_impl.cc

@@ -418,6 +418,10 @@ void WebServiceWorkerRegistrationImpl::SetVersionAttributes(
                        std::move(active)));
     return;
   }
+
+  if (state_ == LifecycleState::kDetached)
+    return;
+  DCHECK_EQ(LifecycleState::kAttachedAndBound, state_);
   ServiceWorkerDispatcher* dispatcher =
       ServiceWorkerDispatcher::GetThreadSpecificInstance();
   DCHECK(dispatcher);