Record Mobile Operator ID in UMA report. This is Android only for now.

chrome/browser/metrics/metrics_network_observer.h

 // Copyright (c) 2013 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 CHROME_BROWSER_METRICS_METRICS_NETWORK_OBSERVER_H_
 #define CHROME_BROWSER_METRICS_METRICS_NETWORK_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 21 matching lines @@
   bool connection_type_is_ambiguous() const {
     return connection_type_is_ambiguous_;
   }
 
   SystemProfileProto::Network::ConnectionType connection_type() const;
 
   bool wifi_phy_layer_protocol_is_ambiguous() const {
     return wifi_phy_layer_protocol_is_ambiguous_;
   }
 
+  std::string network_operator_id() const {
+    return network_operator_id_;
+  }
+
   SystemProfileProto::Network::WifiPHYLayerProtocol
   wifi_phy_layer_protocol() const;
 
  private:
   // 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);
 
+  void GetNetworkOperatorID();
+  void OnNetworkOperatorID(std::string);

[bengr, 2014/04/25 20:39:41]

Can this be OnNetworkOperatorID(const std::string& id) ?

+
   base::WeakPtrFactory<MetricsNetworkObserver> weak_ptr_factory_;
 
   // 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_;
 
+  std::string network_operator_id_;
+
   DISALLOW_COPY_AND_ASSIGN(MetricsNetworkObserver);
 };
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_NETWORK_OBSERVER_H_