Network service: Implement URLLoader chaining for interceptors

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 9e7af001a1c78cc84855ff8a7745d47a1f0c8bfd..bee6717fd1520964f91ff671812804705a582259 100644
--- a/content/browser/loader/navigation_url_loader_network_service.h
+++ b/content/browser/loader/navigation_url_loader_network_service.h
@@ -60,14 +60,18 @@ class NavigationURLLoaderNetworkService : public NavigationURLLoader,
       const ResourceRequestCompletionStatus& completion_status) override;
 
  private:
+  class URLLoaderRequestController;
+
   NavigationURLLoaderDelegate* delegate_;
 
   mojo::Binding<mojom::URLLoaderClient> binding_;
-  std::unique_ptr<NavigationRequestInfo> request_info_;
   mojom::URLLoaderAssociatedPtr url_loader_associated_ptr_;
   scoped_refptr<ResourceResponse> response_;
   SSLStatus ssl_status_;
 
+  // Lives on the IO thread.
+  std::unique_ptr<URLLoaderRequestController> request_controller_;
+
   DISALLOW_COPY_AND_ASSIGN(NavigationURLLoaderNetworkService);
 };