Track network stack error codes from UMA and UKM

components/metrics/net/net_metrics_log_uploader.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_METRICS_NET_NET_METRICS_LOG_UPLOADER_H_
 #define COMPONENTS_METRICS_NET_NET_METRICS_LOG_UPLOADER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 13 matching lines @@
 // Implementation of MetricsLogUploader using the Chrome network stack.
 class NetMetricsLogUploader : public MetricsLogUploader,
                               public net::URLFetcherDelegate {
  public:
   // Constructs a NetMetricsLogUploader which uploads data to |server_url| with
   // the specified |mime_type|. The |service_type| marks which service the
   // data usage should be attributed to. The |on_upload_complete| callback will
   // be called with the HTTP response code of the upload or with -1 on an error.
   // The caller must ensure that |request_context_getter| remains valid for the
   // lifetime of this class.
-  NetMetricsLogUploader(net::URLRequestContextGetter* request_context_getter,
-                        base::StringPiece server_url,
-                        base::StringPiece mime_type,
-                        MetricsLogUploader::MetricServiceType service_type,
-                        const base::Callback<void(int)>& on_upload_complete);
+  NetMetricsLogUploader(
+      net::URLRequestContextGetter* request_context_getter,
+      base::StringPiece server_url,
+      base::StringPiece mime_type,
+      MetricsLogUploader::MetricServiceType service_type,
+      const MetricsLogUploader::UploadCallback& on_upload_complete);
   ~NetMetricsLogUploader() override;
 
   // MetricsLogUploader:
   void UploadLog(const std::string& compressed_log_data,
                  const std::string& log_hash) override;
 
  private:
   // net::URLFetcherDelegate:
   void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   // The request context for fetches done using the network stack.
   net::URLRequestContextGetter* const request_context_getter_;
 
   const GURL server_url_;
   const std::string mime_type_;
   const MetricsLogUploader::MetricServiceType service_type_;
-  const base::Callback<void(int)> on_upload_complete_;
+  const MetricsLogUploader::UploadCallback on_upload_complete_;
 
   // The outstanding transmission appears as a URL Fetch operation.
   std::unique_ptr<net::URLFetcher> current_fetch_;
 
   DISALLOW_COPY_AND_ASSIGN(NetMetricsLogUploader);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_NET_NET_METRICS_LOG_UPLOADER_H_