Service Worker: Update stale workers

content/browser/service_worker/service_worker_context_core.h

Index: content/browser/service_worker/service_worker_context_core.h
diff --git a/content/browser/service_worker/service_worker_context_core.h b/content/browser/service_worker/service_worker_context_core.h
index c764f0724f8267bd6cd4cf4b585e56d54074b6e4..128a8f7f0dae3edb7f9f61ee46d0338beedd4bed 100644
--- a/content/browser/service_worker/service_worker_context_core.h
+++ b/content/browser/service_worker/service_worker_context_core.h
@@ -195,6 +195,11 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   std::vector<ServiceWorkerRegistrationInfo> GetAllLiveRegistrationInfo();
   std::vector<ServiceWorkerVersionInfo> GetAllLiveVersionInfo();
 
+  // ProtectVersion holds a reference to |version| until UnprotectVersion is
+  // called.
+  void ProtectVersion(const scoped_refptr<ServiceWorkerVersion>& version);
+  void UnprotectVersion(int64 version_id);
+
   // Returns new context-local unique ID.
   int GetNewServiceWorkerHandleId();
   int GetNewRegistrationHandleId();
@@ -254,6 +259,7 @@ class CONTENT_EXPORT ServiceWorkerContextCore
   scoped_ptr<ServiceWorkerJobCoordinator> job_coordinator_;
   std::map<int64, ServiceWorkerRegistration*> live_registrations_;
   std::map<int64, ServiceWorkerVersion*> live_versions_;
+  std::map<int64, scoped_refptr<ServiceWorkerVersion>> protected_versions_;
   int next_handle_id_;
   int next_registration_handle_id_;
   scoped_refptr<base::ObserverListThreadSafe<ServiceWorkerContextObserver>>