ServiceWorker: ReadRegistration should return NOT_FOUND when the database is not initialized

content/browser/service_worker/service_worker_database.h

Index: content/browser/service_worker/service_worker_database.h
diff --git a/content/browser/service_worker/service_worker_database.h b/content/browser/service_worker/service_worker_database.h
index 54ec537c743cec8ad747f6019596caa862b1721a..0c889254f10ad1cbf023707e44591c566b87f39a 100644
--- a/content/browser/service_worker/service_worker_database.h
+++ b/content/browser/service_worker/service_worker_database.h
@@ -179,7 +179,7 @@ class CONTENT_EXPORT ServiceWorkerDatabase {
                         const std::string& user_data_name);
 
   // Reads user data for all registrations that have data with |user_data_name|
-  // from the database.
+  // from the database. Returns OK if they are successfully read or not found.
   Status ReadUserDataForAllRegistrations(
       const std::string& user_data_name,
       std::vector<std::pair<int64, std::string>>* user_data);
@@ -362,6 +362,10 @@ class CONTENT_EXPORT ServiceWorkerDatabase {
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest, OpenDatabase_InMemory);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest, DatabaseVersion);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest, GetNextAvailableIds);
+  FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest,
+                           Registration_UninitializedDatabase);
+  FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest,
+                           UserData_UninitializedDatabase);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest, DestroyDatabase);
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDatabase);