Provide skeleton functionality for AppCache handling in the network service.

content/browser/loader/navigation_url_loader_network_service.h

Index: content/browser/loader/navigation_url_loader_network_service.h
diff --git a/content/browser/loader/navigation_url_loader_network_service.h b/content/browser/loader/navigation_url_loader_network_service.h
index 30196ee69a75d22b547e85b7bdf2780c1ccc49dd..b5700e10cc93fe0f1678697bba5f749c783412d0 100644
--- a/content/browser/loader/navigation_url_loader_network_service.h
+++ b/content/browser/loader/navigation_url_loader_network_service.h
@@ -67,7 +67,8 @@ class NavigationURLLoaderNetworkService : public NavigationURLLoader,
       const ResourceRequestCompletionStatus& completion_status) override;
 
   // Initiates the request.
-  void StartURLRequest(std::unique_ptr<ResourceRequest> request);
+  void StartURLRequest(mojom::URLLoaderFactoryPtrInfo url_loader_factory_info,
+                       std::unique_ptr<ResourceRequest> request);
 
  private:
   void ConnectURLLoaderFactory(
@@ -77,6 +78,7 @@ class NavigationURLLoaderNetworkService : public NavigationURLLoader,
 
   NavigationURLLoaderDelegate* delegate_;
 
+  mojom::URLLoaderFactoryPtr url_loader_factory_;
   mojo::Binding<mojom::URLLoaderClient> binding_;
   std::unique_ptr<NavigationRequestInfo> request_info_;
   mojom::URLLoaderAssociatedPtr url_loader_associated_ptr_;