Store foreign fetch scopes in database with other SW information.

content/browser/service_worker/service_worker_storage.h

Index: content/browser/service_worker/service_worker_storage.h
diff --git a/content/browser/service_worker/service_worker_storage.h b/content/browser/service_worker/service_worker_storage.h
index 7c82915cba2e75885bb7fd072d00e41db14b13eb..23f1af7b843459e692ee7943785fd226bfaef492 100644
--- a/content/browser/service_worker/service_worker_storage.h
+++ b/content/browser/service_worker/service_worker_storage.h
@@ -177,6 +177,10 @@ class CONTENT_EXPORT ServiceWorkerStorage
       const std::string& key,
       const GetUserDataForAllRegistrationsCallback& callback);
 
+  // Returns true if any service workers at |origin| have registered for foreign
+  // fetch.
+  bool OriginHasForeignFetchRegistrations(const GURL& origin);
+
   // Deletes the storage and starts over.
   void DeleteAndStartOver(const StatusCallback& callback);
 
@@ -249,6 +253,7 @@ class CONTENT_EXPORT ServiceWorkerStorage
     std::set<GURL> origins;
     bool disk_cache_migration_needed;
     bool old_disk_cache_deletion_needed;
+    std::set<GURL> foreign_fetch_origins;
 
     InitialData();
     ~InitialData();
@@ -264,6 +269,16 @@ class CONTENT_EXPORT ServiceWorkerStorage
     ~DidDeleteRegistrationParams();
   };
 
+  enum class OriginState {
+    // Other registrations with foreign fetch scopes exist for the origin.
+    KEEP_ALL,
+    // Other registrations exist at this origin, but none of them have foreign
+    // fetch scopes.
+    DELETE_FROM_FOREIGN_FETCH,
+    // No other registrations exist at this origin.
+    DELETE_FROM_ALL
+  };
+
   typedef std::vector<ServiceWorkerDatabase::RegistrationData> RegistrationList;
   typedef std::map<int64, scoped_refptr<ServiceWorkerRegistration> >
       RegistrationRefsById;
@@ -278,7 +293,7 @@ class CONTENT_EXPORT ServiceWorkerStorage
       const std::vector<int64>& newly_purgeable_resources,
       ServiceWorkerDatabase::Status status)> WriteRegistrationCallback;
   typedef base::Callback<void(
-      bool origin_is_deletable,
+      OriginState origin_state,
       const ServiceWorkerDatabase::RegistrationData& deleted_version_data,
       const std::vector<int64>& newly_purgeable_resources,
       ServiceWorkerDatabase::Status status)> DeleteRegistrationCallback;
@@ -357,7 +372,7 @@ class CONTENT_EXPORT ServiceWorkerStorage
       ServiceWorkerDatabase::Status status);
   void DidDeleteRegistration(
       const DidDeleteRegistrationParams& params,
-      bool origin_is_deletable,
+      OriginState origin_state,
       const ServiceWorkerDatabase::RegistrationData& deleted_version,
       const std::vector<int64>& newly_purgeable_resources,
       ServiceWorkerDatabase::Status status);
@@ -494,6 +509,7 @@ class CONTENT_EXPORT ServiceWorkerStorage
 
   // Origins having registations.
   std::set<GURL> registered_origins_;
+  std::set<GURL> foreign_fetch_origins_;
 
   // Pending database tasks waiting for initialization.
   std::vector<base::Closure> pending_tasks_;