Fix SitePerProcessBrowserTest.ProcessTransferAfterError to not requiring modifying the mock HostRes…

content/browser/loader/navigation_url_loader_network_service.h

 // Copyright 2017 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_LOADER_NAVIGATION_URL_LOADER_NETWORK_SERVICE_H_
 #define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_NETWORK_SERVICE_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/loader/navigation_url_loader.h"
+#include "content/common/content_export.h"
 #include "content/common/url_loader.mojom.h"
 #include "content/common/url_loader_factory.mojom.h"
 #include "content/public/browser/ssl_status.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/service_manager/public/cpp/connector.h"
 
 namespace net {
 struct RedirectInfo;
 }
 
@@ skipping 11 matching lines @@
   NavigationURLLoaderNetworkService(
       ResourceContext* resource_context,
       StoragePartition* storage_partition,
       std::unique_ptr<NavigationRequestInfo> request_info,
       std::unique_ptr<NavigationUIData> navigation_ui_data,
       ServiceWorkerNavigationHandle* service_worker_handle,
       AppCacheNavigationHandle* appcache_handle,
       NavigationURLLoaderDelegate* delegate);
   ~NavigationURLLoaderNetworkService() override;
 
+  // Overrides the URLLoaderFactory for the next request.
+  static CONTENT_EXPORT void OverrideURLLoaderFactoryForTesting(
+      mojom::URLLoaderFactoryPtr url_loader_factory);
+
   // NavigationURLLoader implementation:
   void FollowRedirect() override;
   void ProceedWithResponse() override;
 
   // mojom::URLLoaderClient implementation:
   void OnReceiveResponse(const ResourceResponseHead& head,
                          const base::Optional<net::SSLInfo>& ssl_info,
                          mojom::DownloadedTempFilePtr downloaded_file) override;
   void OnReceiveRedirect(const net::RedirectInfo& redirect_info,
                          const ResourceResponseHead& head) override;
@@ skipping 24 matching lines @@
   SSLStatus ssl_status_;
 
   base::WeakPtrFactory<NavigationURLLoaderNetworkService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationURLLoaderNetworkService);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_NETWORK_SERVICE_H_