Support needed to measure user and service traffic in Chrome.

chrome/browser/net/chrome_network_delegate.cc

 // 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.
 
 #include "chrome/browser/net/chrome_network_delegate.h"
 
 #include <stdlib.h>
 
 #include <vector>
 
@@ skipping 473 matching lines @@
 #if defined(ENABLE_TASK_MANAGER)
   // Note: Currently, OnNetworkBytesReceived is only implemented for HTTP jobs,
   // not FTP or other types, so those kinds of bytes will not be reported here.
   task_management::TaskManagerInterface::OnRawBytesRead(request,
                                                         bytes_received);
 #endif  // defined(ENABLE_TASK_MANAGER)
 }
 
 void ChromeNetworkDelegate::OnCompleted(net::URLRequest* request,
                                         bool started) {
+  data_use_measurement_.ReportDataUseUMA(request);

[mmenke, 2015/09/02 21:48:08]

You need to do this on redirects, too - following a redirect reset the bytes
received/sent (Though if the request is cancelled instead of following the
redirect, we'll end up here, and you'll double count the data, I believe.  I
don't see an easy way around that.  Suggest a TODO)

[amohammadkhan, 2015/09/03 04:31:18]

Done.

   RecordNetworkErrorHistograms(request);
   if (started) {
     // Only call in for requests that were started, to obey the precondition
     // that RecordCacheStateStats can only be called on requests for which
     // OnResponseStarted was called.
     RecordCacheStateStats(request);
   }
 
   if (request->status().status() == net::URLRequestStatus::SUCCESS) {
 #if defined(OS_ANDROID)
@@ skipping 185 matching lines @@
   return experimental_web_platform_features_enabled_;
 }
 
 bool ChromeNetworkDelegate::OnCancelURLRequestWithPolicyViolatingReferrerHeader(
     const net::URLRequest& request,
     const GURL& target_url,
     const GURL& referrer_url) const {
   ReportInvalidReferrerSend(target_url, referrer_url);
   return true;
 }