Move HttpStreamFactoryImpl::JobController UMA to a schedule upload

net/base/network_change_notifier.h

Index: net/base/network_change_notifier.h
diff --git a/net/base/network_change_notifier.h b/net/base/network_change_notifier.h
index a758cc3acf30c0400368d81280248e5971d0d8e7..8701b99fd366ab1b51233a73b7795ef98c7ff2d9 100644
--- a/net/base/network_change_notifier.h
+++ b/net/base/network_change_notifier.h
@@ -247,6 +247,21 @@ class NET_EXPORT NetworkChangeNotifier {
     DISALLOW_COPY_AND_ASSIGN(NetworkObserver);
   };
 
+  // An interface that when implemented and added via AddMetricsObserver(),
+  // provides notifications when metrics are cut. The callback is called
+  // asynchronously on observer's thread.
+  class NET_EXPORT MetricsObserver {
+   public:
+    virtual void OnMetricsFinalize() = 0;
+
+   protected:
+    MetricsObserver() {}
+    virtual ~MetricsObserver() {}
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(MetricsObserver);
+  };
+
   // An invalid NetworkHandle.
   static const NetworkHandle kInvalidNetworkHandle;
 
@@ -379,6 +394,7 @@ class NET_EXPORT NetworkChangeNotifier {
   static void AddDNSObserver(DNSObserver* observer);
   static void AddNetworkChangeObserver(NetworkChangeObserver* observer);
   static void AddMaxBandwidthObserver(MaxBandwidthObserver* observer);
+  static void AddMetricsObserver(MetricsObserver* observer);
   static void AddNetworkObserver(NetworkObserver* observer);
 
   // Unregisters |observer| from receiving notifications.  This must be called
@@ -517,7 +533,7 @@ class NET_EXPORT NetworkChangeNotifier {
 
   // Hook that allows derived implementations to log histograms at the time a
   // new histogram record is being finalized.
-  virtual void OnFinalizingMetricsLogRecord() {}
+  virtual void OnFinalizingMetricsLogRecord();
 
   // Broadcasts a notification to all registered observers.  Note that this
   // happens asynchronously, even for observers on the current thread, even in
@@ -554,6 +570,8 @@ class NET_EXPORT NetworkChangeNotifier {
   void NotifyObserversOfNetworkChangeImpl(ConnectionType type);
   void NotifyObserversOfMaxBandwidthChangeImpl(double max_bandwidth_mbps,
                                                ConnectionType type);
+  void NotifyObserversOfMetricsOnFinalize();
+
   void NotifyObserversOfSpecificNetworkChangeImpl(NetworkChangeType type,
                                                   NetworkHandle network);
 
@@ -569,6 +587,8 @@ class NET_EXPORT NetworkChangeNotifier {
       max_bandwidth_observer_list_;
   const scoped_refptr<base::ObserverListThreadSafe<NetworkObserver>>
       network_observer_list_;
+  const scoped_refptr<base::ObserverListThreadSafe<MetricsObserver>>
+      metrics_observer_list_;
 
   // The current network state. Hosts DnsConfig, exposed via GetDnsConfig.
   std::unique_ptr<NetworkState> network_state_;