Add NetworkChangeNotifier::ConnectionType to SystemProfile.

chrome/browser/metrics/metrics_log.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.
 
 // This file defines a set of user experience metrics data recorded by
 // the MetricsService.  This is the unit of data that is sent to the server.
 
 #ifndef CHROME_BROWSER_METRICS_METRICS_LOG_H_
 #define CHROME_BROWSER_METRICS_METRICS_LOG_H_
 
@@ skipping 123 matching lines @@
   virtual int GetScreenCount() const;
 
   // Fills |field_trial_ids| with the list of initialized field trials name and
   // group ids.
   virtual void GetFieldTrialIds(
     std::vector<chrome_variations::ActiveGroupId>* field_trial_ids) const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MetricsLogTest, ChromeOSStabilityData);
 
+  class NetworkObserver;
+
   // Writes application stability metrics (as part of the profile log).
   // NOTE: Has the side-effect of clearing those counts.
   void WriteStabilityElement(
       const std::vector<webkit::WebPluginInfo>& plugin_list,
       PrefService* pref);
 
   // Within stability group, write plugin crash stats.
   void WritePluginStabilityElements(
       const std::vector<webkit::WebPluginInfo>& plugin_list,
       PrefService* pref);
@@ skipping 23 matching lines @@
 
   // Writes metrics for the profile identified by key. This writes all
   // key/value pairs in profile_metrics.
   void WriteProfileMetrics(const std::string& key,
                            const base::DictionaryValue& profile_metrics);
 
   // Writes info about the Google Update install that is managing this client.
   // This is a no-op if called on a non-Windows platform.
   void WriteGoogleUpdateProto(const GoogleUpdateMetrics& google_update_metrics);
 
+  // Registers as observer with net::NetworkChangeNotifier and keeps track of
+  // the network environment.
+  scoped_ptr<NetworkObserver> network_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(MetricsLog);
 };
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_LOG_H_