Track network stack error codes from UMA and UKM

components/metrics/reporting_service.cc

 // 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.
 
 // ReportingService handles uploading serialized logs to a server.
 
 #include "components/metrics/reporting_service.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 136 matching lines @@
         base::Bind(&ReportingService::OnLogUploadComplete,
                    self_ptr_factory_.GetWeakPtr()));
   }
 
   const std::string hash =
       base::HexEncode(log_store()->staged_log_hash().data(),
                       log_store()->staged_log_hash().size());
   log_uploader_->UploadLog(log_store()->staged_log(), hash);
 }
 
-void ReportingService::OnLogUploadComplete(int response_code) {
+void ReportingService::OnLogUploadComplete(int response_code, int error_code) {
   DVLOG(1) << "OnLogUploadComplete:" << response_code;
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(log_upload_in_progress_);
   log_upload_in_progress_ = false;
 
   // Log a histogram to track response success vs. failure rates.
   LogResponseCode(response_code);
+  if (error_code)
+    LogErrorCode(error_code);
 
   bool upload_succeeded = response_code == 200;
 
   // Staged log could have been removed already (such as by Purge() in some
   // implementations), otherwise we may remove it here.
   if (log_store()->has_staged_log()) {
     // Provide boolean for error recovery (allow us to ignore response_code).
     bool discard_log = false;
     const size_t log_size = log_store()->staged_log().length();
     if (upload_succeeded) {
@@ skipping 17 matching lines @@
   // don't consider that a sign that the server is in trouble.
   bool server_is_healthy = upload_succeeded || response_code == 400;
   if (!log_store()->has_unsent_logs()) {
     DVLOG(1) << "Stopping upload_scheduler_.";
     upload_scheduler_->Stop();
   }
   upload_scheduler_->UploadFinished(server_is_healthy);
 }
 
 }  // namespace metrics