ServiceWorker: Keep the worker alive until FetchEvent.waitUntil settles

third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h

Index: third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
diff --git a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
index 013e26288bcb9e382e84d34bf36ea89ec066d4c2..67b1cc9c2edd1aac8c2aa1989da88d370aa65c06 100644
--- a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
+++ b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
@@ -114,11 +114,15 @@ public:
     // script context.
     virtual void didHandleExtendableMessageEvent(int eventID, WebServiceWorkerEventResult result) { }
 
-    // ServiceWorker specific methods. Called after FetchEvent is handled by the
-    // ServiceWorker's script context. When no response is provided, the browser
-    // should fallback to native fetch.
-    virtual void didHandleFetchEvent(int fetchEventID) { }
-    virtual void didHandleFetchEvent(int fetchEventID, const WebServiceWorkerResponse& response) { }
+    // ServiceWorker specific methods. respondFetchEvent will be called after
+    // FetchEvent returns a response by the ServiceWorker's script context, and
+    // didHandleFetchEvent will be called after the end of FetchEvent's
+    // lifecycle. When no response is provided, the browser should fallback to
+    // native fetch. EventIDs are the same with the ids passed from
+    // dispatchFetchEvent respectively.
+    virtual void respondFetchEvent(int responseEventID) { };
+    virtual void respondFetchEvent(int responseEventID, const WebServiceWorkerResponse& response) { };
+    virtual void didHandleFetchEvent(int finishEventID, WebServiceWorkerEventResult result) { };
 
     // ServiceWorker specific method. Called after InstallEvent (dispatched
     // via WebServiceWorkerContextProxy) is handled by the ServiceWorker's