Enable UMA log uploads for cellular networks.

components/metrics/metrics_service.h

Index: components/metrics/metrics_service.h
diff --git a/components/metrics/metrics_service.h b/components/metrics/metrics_service.h
index 904147454ed490eafc424edf046475a15db67d24..9ab71eb24a6062f0b59aa61e70fb1da5de738f1c 100644
--- a/components/metrics/metrics_service.h
+++ b/components/metrics/metrics_service.h
@@ -27,6 +27,7 @@
 #include "components/metrics/metrics_log.h"
 #include "components/metrics/metrics_log_manager.h"
 #include "components/metrics/metrics_provider.h"
+#include "components/metrics/net/network_metrics_provider.h"
 #include "components/variations/active_field_trials.h"
 
 class MetricsServiceAccessor;
@@ -242,6 +243,10 @@ class MetricsService : public base::HistogramFlattener {
   // Clears the stability metrics that are saved in local state.
   void ClearSavedStabilityMetrics();
 
+  // Sets the network metrics provider and registers it as a provider.
+  void SetNetworkMetricsProvider(
+      scoped_ptr<NetworkMetricsProvider> network_metrics_provider);
+
  protected:
   // Exposed for testing.
   MetricsLogManager* log_manager() { return &log_manager_; }
@@ -401,6 +406,13 @@ class MetricsService : public base::HistogramFlattener {
   // i.e., histograms with the |kUmaStabilityHistogramFlag| flag set.
   void RecordCurrentStabilityHistograms();
 
+  // Returns true if the connection type is 2G, 3G, or 4G.
+  bool IsCellularConnection();
+
+  // Assigns the passed |is_cellular_out| parameter based on whether current
+  // network connection is cellular.
+  void GetIsCellularConnection(bool* is_cellular_out);
+
   // Manager for the various in-flight logs.
   MetricsLogManager log_manager_;
 
@@ -481,6 +493,9 @@ class MetricsService : public base::HistogramFlattener {
   // exited-cleanly bit in the prefs.
   static ShutdownCleanliness clean_shutdown_status_;
 
+  // Network metrics provider used for getting current connection type.
+  const NetworkMetricsProvider* network_metrics_provider_;
+
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, IsPluginProcess);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest,
                            PermutedEntropyCacheClearedWhenLowEntropyReset);