Enable UMA log uploads for cellular networks.

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/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.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/net_util.h"
 #include "net/base/network_change_notifier.h"
 
 namespace metrics {
 
 // Registers as observer with net::NetworkChangeNotifier and keeps track of
 // the network environment.
 class NetworkMetricsProvider
     : public MetricsProvider,
       public net::NetworkChangeNotifier::ConnectionTypeObserver {
  public:
   // Creates a NetworkMetricsProvider, where |io_task_runner| is used to post
   // network info collection tasks.
   explicit NetworkMetricsProvider(base::TaskRunner* io_task_runner);
   ~NetworkMetricsProvider() override;
 
+  // Returns callback function which can be used to get whether current
+  // connection type is cellular.

[Alexei Svitkine (slow), 2015/02/23 20:18:15]

Mention that the callback is bound to a weak pointer to the provider.

[gayane -on leave until 09-2017, 2015/02/23 20:27:53]

Done.

+  base::Callback<void(bool*)> GetConnectionCallback();
+
  private:
   // MetricsProvider:
   void OnDidCreateMetricsLog() override;
   void ProvideSystemProfileMetrics(SystemProfileProto* system_profile) override;
 
   // ConnectionTypeObserver:
   void OnConnectionTypeChanged(
       net::NetworkChangeNotifier::ConnectionType type) override;
 
   SystemProfileProto::Network::ConnectionType GetConnectionType() const;
   SystemProfileProto::Network::WifiPHYLayerProtocol GetWifiPHYLayerProtocol()
       const;
 
   // Posts a call to net::GetWifiPHYLayerProtocol on the blocking pool.
   void ProbeWifiPHYLayerProtocol();
   // 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);
 
+  // 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);
+
   // 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_;
 
   base::WeakPtrFactory<NetworkMetricsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkMetricsProvider);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_NET_NETWORK_METRICS_PROVIDER_H_