Network service: Implement URLLoader chaining for interceptors

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 "content/browser/loader/navigation_url_loader.h"
 #include "content/common/url_loader.mojom.h"
@@ skipping 42 matching lines @@
                         int64_t total_size,
                         OnUploadProgressCallback callback) override;
   void OnReceiveCachedMetadata(const std::vector<uint8_t>& data) override;
   void OnTransferSizeUpdated(int32_t transfer_size_diff) override;
   void OnStartLoadingResponseBody(
       mojo::ScopedDataPipeConsumerHandle body) override;
   void OnComplete(
       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);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_NETWORK_SERVICE_H_