Use modified URLRequest::Read() and delegate methods in components/

components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_NETWORK_DELEGATE_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_NETWORK_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 98 matching lines @@
   // some information like the socket address is not available.
   void OnCompletedInternal(net::URLRequest* request,
                            bool started) override;
 
   // Calculates actual data usage that went over the network at the HTTP layer
   // (e.g. not including network layer overhead) and estimates original data
   // usage for |request|. Passing in -1 for |original_content_length| indicates
   // that the original content length of the response could not be determined.
   void CalculateAndRecordDataUsage(const net::URLRequest& request,
                                    DataReductionProxyRequestType request_type,
-                                   int64_t original_content_length);
+                                   int64_t original_content_length,
+                                   int net_error);
 
   // Posts to the UI thread to UpdateContentLengthPrefs in the data reduction
   // proxy metrics and updates |received_content_length_| and
   // |original_content_length_|.
   void AccumulateDataUsage(int64_t data_used,
                            int64_t original_size,
                            DataReductionProxyRequestType request_type,
                            const scoped_refptr<DataUseGroup>& data_use_group,
                            const std::string& mime_type);
 
@@ skipping 34 matching lines @@
 
   const DataReductionProxyConfigurator* configurator_;
 
   std::unique_ptr<DataUseGroupProvider> data_use_group_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyNetworkDelegate);
 };
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_NETWORK_DELEGATE_H_