Send the decoded size when response completed and stop summing in ResourceLoader::DidReceiveData()

content/common/resource_request_completion_status.h

 // Copyright 2016 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_COMMON_RESOURCE_REQUEST_COMPLETION_STATUS_H_
 #define CONTENT_COMMON_RESOURCE_REQUEST_COMPLETION_STATUS_H_
 
 #include <stdint.h>
 #include <string>
 
@@ skipping 18 matching lines @@
   bool exists_in_cache = false;
 
   // Time the request completed.
   base::TimeTicks completion_time;
 
   // Total amount of data received from the network.
   int64_t encoded_data_length = 0;
 
   // The length of the response body before removing any content encodings.
   int64_t encoded_body_length = 0;
+
+  // The length of the response body after decoding.
+  int64_t decoded_body_length = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_RESOURCE_REQUEST_COMPLETION_STATUS_H_