Network service: Implement URLLoader chaining for interceptors

content/browser/service_worker/service_worker_controllee_request_handler.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTROLLEE_REQUEST_HANDLER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTROLLEE_REQUEST_HANDLER_H_
 
 #include <stdint.h>
 
 #include "base/gtest_prod_util.h"
@@ skipping 35 matching lines @@
       FetchRequestMode request_mode,
       FetchCredentialsMode credentials_mode,
       FetchRedirectMode redirect_mode,
       ResourceType resource_type,
       RequestContextType request_context_type,
       RequestContextFrameType frame_type,
       scoped_refptr<ResourceRequestBodyImpl> body);
   ~ServiceWorkerControlleeRequestHandler() override;
 
   // Called via custom URLRequestJobFactory.
+  // Returning a nullptr indicates that the request is not handled by
+  // this handler.
+  // This could get called multiple times during the lifetime.
   net::URLRequestJob* MaybeCreateJob(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate,
       ResourceContext* resource_context) override;
 
+  // Used only for PlzNavigate and --enable-network-service cases.
+  // This will replace MaybeCreateJob() once NetworkService is enabled.
+  // This could get called multiple times during the lifetime in redirect
+  // cases. (In fallback-to-network cases we basically forward the request
+  // to the request to the next request handler)
+  // URLLoaderRequestHandler overrides:
+  void MaybeCreateLoaderFactory(
+      const ResourceRequest& request,
+      ResourceContext* resource_context,
+      base::OnceCallback<void(mojom::URLLoaderFactory*)> callback) override;
+
  private:
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerControlleeRequestHandlerTest,
                            ActivateWaitingVersion);
   typedef ServiceWorkerControlleeRequestHandler self;
 
   // For main resource case.
   void PrepareForMainResource(const GURL& url,
                               const GURL& first_party_for_cookies);
   void DidLookupRegistrationForMainResource(
       ServiceWorkerStatusCode status,
@@ skipping 51 matching lines @@
   bool use_network_;
 
   base::WeakPtrFactory<ServiceWorkerControlleeRequestHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerControlleeRequestHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTROLLEE_REQUEST_HANDLER_H_