moved to https://codereview.chromium.org/399543002/

Source/web/ServiceWorkerGlobalScopeClientImpl.cpp

Index: Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
index 755a1b7a2c6269803b1326fdf6a03a26798d4a47..4026b91a1ffc13551f3f273ec4420d67db6a4c28 100644
--- a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
@@ -80,6 +80,10 @@ void ServiceWorkerGlobalScopeClientImpl::didHandleFetchEvent(int fetchEventID, P
 
     WebServiceWorkerResponse webResponse;
     response->populateWebServiceWorkerResponse(webResponse);
+    if (webResponse.status() == 0) {
+        m_client.didHandleFetchEvent(fetchEventID);
+        return;
+    }
     m_client.didHandleFetchEvent(fetchEventID, webResponse);
 }