Add ServiceWorkerVersion::status() (which is to be persisted unlike running status)

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 92af988515594d1e840563372f7d8acf2ec5ea25..0be7089ef05ccfe24f508a91810de7bfa20c3648 100644
--- a/content/browser/service_worker/service_worker_storage.cc
+++ b/content/browser/service_worker/service_worker_storage.cc
@@ -22,12 +22,13 @@ void RunSoon(const base::Closure& closure) {
 const base::FilePath::CharType kServiceWorkerDirectory[] =
     FILE_PATH_LITERAL("ServiceWorker");
 
-}
+}  // namespace
 
 ServiceWorkerStorage::ServiceWorkerStorage(
     const base::FilePath& path,
     quota::QuotaManagerProxy* quota_manager_proxy)
     : last_registration_id_(0),  // TODO(kinuko): this should be read from disk.
+      last_version_id_(0),       // TODO(kinuko): this should be read from disk.
       quota_manager_proxy_(quota_manager_proxy) {
   if (!path.empty())
     path_ = path.Append(kServiceWorkerDirectory);
@@ -116,6 +117,10 @@ int64 ServiceWorkerStorage::NewRegistrationId() {
   return ++last_registration_id_;
 }
 
+int64 ServiceWorkerStorage::NewVersionId() {
+  return ++last_version_id_;
+}
+
 bool ServiceWorkerStorage::PatternMatches(const GURL& pattern,
                                           const GURL& url) {
   // This is a really basic, naive