[net] Add WifiPhyMode to SystemProfile

chrome/browser/metrics/metrics_log.h

Index: chrome/browser/metrics/metrics_log.h
diff --git a/chrome/browser/metrics/metrics_log.h b/chrome/browser/metrics/metrics_log.h
index 3c6ae45bc9633121e6b93924d749bfe10a82bfc0..764c20d8190006184230b0e13188add8a91638ee 100644
--- a/chrome/browser/metrics/metrics_log.h
+++ b/chrome/browser/metrics/metrics_log.h
@@ -22,6 +22,7 @@
 #endif
 
 struct AutocompleteLog;
+class MetricsNetworkObserver;
 class PrefService;
 class PrefRegistrySimple;
 
@@ -145,8 +146,6 @@ class MetricsLog : public MetricsLogBase {
  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(
@@ -190,9 +189,8 @@ class MetricsLog : public MetricsLogBase {
   // 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_;
+  scoped_ptr<MetricsNetworkObserver> network_observer_;
+
 #if defined(OS_CHROMEOS)
   metrics::PerfProvider perf_provider_;
 #endif