Support needed to measure user and service traffic in Chrome.

net/url_request/url_fetcher.h

 // Copyright (c) 2012 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 NET_URL_REQUEST_URL_FETCHER_H_
 #define NET_URL_REQUEST_URL_FETCHER_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 121 matching lines @@
   static void SetIgnoreCertificateRequests(bool ignored);
 
   // Sets data only needed by POSTs.  All callers making POST requests should
   // call one of the SetUpload* methods before the request is started.
   // |upload_content_type| is the MIME type of the content, while
   // |upload_content| is the data to be sent (the Content-Length header value
   // will be set to the length of this data).
   virtual void SetUploadData(const std::string& upload_content_type,
                              const std::string& upload_content) = 0;
 
+  // When a service uses URLFetcher to exchange some information, after
+  // completing the fetch procedure, it can call this function by passing its
+  // name, so its usage will be recorded in according histograms. (It is
+  // necessary to make proper histogram in histograms.xml file before calling
+  // this function.
+  void ReportYourUsage(const std::string& service) const;

[bengr, 2015/08/07 18:00:01]

How about this?
void ReportUsageUMA(const std::string& service_name) const;

[amohammadkhan, 2015/08/11 22:04:36]

Done.

+
   // Sets data only needed by POSTs.  All callers making POST requests should
   // call one of the SetUpload* methods before the request is started.
   // |upload_content_type| is the MIME type of the content, while
   // |file_path| is the path to the file containing the data to be sent (the
   // Content-Length header value will be set to the length of this file).
   // |range_offset| and |range_length| specify the range of the part
   // to be uploaded. To upload the whole file, (0, kuint64max) can be used.
   // |file_task_runner| will be used for all file operations.
   virtual void SetUploadFilePath(
       const std::string& upload_content_type,
@@ skipping 153 matching lines @@
   // Return the URL that this fetcher is processing.
   virtual const GURL& GetURL() const = 0;
 
   // The status of the URL fetch.
   virtual const URLRequestStatus& GetStatus() const = 0;
 
   // The http response code received. Will return RESPONSE_CODE_INVALID
   // if an error prevented any response from being received.
   virtual int GetResponseCode() const = 0;
 
+  // Total number of bytes received, including the headers and before
+  // uncompressing

[bengr, 2015/08/07 18:00:01]

Add a period.

[amohammadkhan, 2015/08/11 22:04:36]

Done.

+  virtual int64 GetBytesReceivedSize() const = 0;
+
+  // Total number of bytes sent including the header size and POST body. But
+  // this value is before compression, so it may not be a good representative of

[bengr, 2015/08/07 18:00:01]

Why report it then?

[amohammadkhan, 2015/08/11 22:04:36]

Done.

+  // number of received bytes on the wire.
+  virtual int64 GetBytesSentSize() const = 0;
+
   // Cookies received.
   virtual const ResponseCookies& GetCookies() const = 0;
 
   // Reports that the received content was malformed.
   virtual void ReceivedContentWasMalformed() = 0;
 
   // Get the response as a string. Return false if the fetcher was not
   // set to store the response as a string.
   virtual bool GetResponseAsString(std::string* out_response_string) const = 0;
 
   // Get the path to the file containing the response body. Returns false
   // if the response body was not saved to a file. If take_ownership is
   // true, caller takes responsibility for the file, and it will not
   // be removed once the URLFetcher is destroyed.  User should not take
   // ownership more than once, or call this method after taking ownership.
   virtual bool GetResponseAsFilePath(
       bool take_ownership,
       base::FilePath* out_response_path) const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_FETCHER_H_