ServiceWorker: Use mojo's data pipe for respondWith(stream)

content/common/service_worker/service_worker_types.h

Index: content/common/service_worker/service_worker_types.h
diff --git a/content/common/service_worker/service_worker_types.h b/content/common/service_worker/service_worker_types.h
index a2ace940c6361a298c66b92a0eb8387033ae633b..ea22f5c3e723508a6ac2448ee160eb3f0b6303dc 100644
--- a/content/common/service_worker/service_worker_types.h
+++ b/content/common/service_worker/service_worker_types.h
@@ -179,7 +179,6 @@ struct CONTENT_EXPORT ServiceWorkerResponse {
       std::unique_ptr<ServiceWorkerHeaderMap> headers,
       const std::string& blob_uuid,
       uint64_t blob_size,
-      const GURL& stream_url,
       blink::WebServiceWorkerResponseError error,
       base::Time response_time,
       bool is_in_cache_storage,
@@ -195,9 +194,11 @@ struct CONTENT_EXPORT ServiceWorkerResponse {
   std::string status_text;
   blink::WebServiceWorkerResponseType response_type;
   ServiceWorkerHeaderMap headers;
+  // |blob_uuid| and |blob_size| are set when the body is a blob. For other
+  // types of responses, the body is provided separately in Mojo IPC via
+  // ServiceWorkerFetchResponseCallback.
   std::string blob_uuid;
   uint64_t blob_size;
-  GURL stream_url;
   blink::WebServiceWorkerResponseError error;
   base::Time response_time;
   bool is_in_cache_storage = false;