Log aggregated abort metrics when histograms are uploaded

components/metrics/net/network_metrics_provider.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_NETWORK_METRICS_PROVIDER_H_
 #define COMPONENTS_METRICS_NET_NETWORK_METRICS_PROVIDER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/metrics/histogram_base.h"
 #include "components/metrics/metrics_provider.h"
 #include "components/metrics/net/wifi_access_point_info_provider.h"
 #include "components/metrics/proto/system_profile.pb.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/network_interfaces.h"
 
 namespace metrics {
 
 // Registers as observer with net::NetworkChangeNotifier and keeps track of
 // the network environment.
@@ skipping 24 matching lines @@
   // Callback from the blocking pool with the result of
   // net::GetWifiPHYLayerProtocol.
   void OnWifiPHYLayerProtocolResult(net::WifiPHYLayerProtocol mode);
 
   // Writes info about the wireless access points that this system is
   // connected to.
   void WriteWifiAccessPointProto(
       const WifiAccessPointInfoProvider::WifiAccessPointInfo& info,
       SystemProfileProto::Network* network_proto);
 
+  // Logs metrics that are functions of other metrics being uploaded.
+  void LogAggregatedMetrics();
+
   // Task runner used for blocking file I/O.
   base::TaskRunner* io_task_runner_;
 
   // True if |connection_type_| changed during the lifetime of the log.
   bool connection_type_is_ambiguous_;
   // The connection type according to net::NetworkChangeNotifier.
   net::NetworkChangeNotifier::ConnectionType connection_type_;
 
   // True if |wifi_phy_layer_protocol_| changed during the lifetime of the log.
   bool wifi_phy_layer_protocol_is_ambiguous_;
   // The PHY mode of the currently associated access point obtained via
   // net::GetWifiPHYLayerProtocol.
   net::WifiPHYLayerProtocol wifi_phy_layer_protocol_;
 
   // Helper object for retrieving connected wifi access point information.
   scoped_ptr<WifiAccessPointInfoProvider> wifi_access_point_info_provider_;
 
+  // These metrics track histogram totals for the Net.ErrorCodesForMainFrame3
+  // histogram. They are used to compute deltas at upload time.
+  base::HistogramBase::Count total_aborts_;
+  base::HistogramBase::Count total_codes_;
+
   base::WeakPtrFactory<NetworkMetricsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkMetricsProvider);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_NET_NETWORK_METRICS_PROVIDER_H_