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

net/base/network_change_notifier.cc

 // Copyright (c) 2012 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.
 
 #include "net/base/network_change_notifier.h"
 
 #include "base/metrics/histogram.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "build/build_config.h"
 #include "net/base/net_util.h"
 #include "net/base/network_change_notifier_factory.h"
 #include "net/dns/dns_config_service.h"
 #include "net/url_request/url_request.h"
 #include "url/gurl.h"
 
+#if defined(OS_ANDROID)
+#include "base/metrics/sparse_histogram.h"
+#include "base/strings/string_number_conversions.h"
+#include "net/android/network_library.h"
+#endif
+
 #if defined(OS_WIN)
 #include "net/base/network_change_notifier_win.h"
 #elif defined(OS_LINUX) && !defined(OS_CHROMEOS)
 #include "net/base/network_change_notifier_linux.h"
 #elif defined(OS_MACOSX)
 #include "net/base/network_change_notifier_mac.h"
 #endif
 
 namespace net {
 
@@ skipping 194 matching lines @@
               "NCN.OfflineDataRecvAny5sBeforeOnline",
               offline_packets_received_);
         }
 
         UMA_HISTOGRAM_MEDIUM_TIMES("NCN.OfflineDataRecvUntilOnline",
                                    now - last_offline_packet_received_);
       }
     } else {
       UMA_HISTOGRAM_MEDIUM_TIMES("NCN.OfflineChange", state_duration);
     }
+
+#if defined(OS_ANDROID)
+    // On a connection type change to 2/3/4G, log the network operator MCC/MNC.
+    // Log zero in other cases.
+    unsigned mcc_mnc = 0;
+    if (type == NetworkChangeNotifier::CONNECTION_2G ||
+        type == NetworkChangeNotifier::CONNECTION_3G ||
+        type == NetworkChangeNotifier::CONNECTION_4G) {
+      // Log zero if not perfectly converted.
+      if (!base::StringToUint(
+          net::android::GetTelephonyNetworkOperator(), &mcc_mnc)) {
+        mcc_mnc = 0;
+      }
+    }
+    UMA_HISTOGRAM_SPARSE_SLOWLY(
+        "NCN.NetworkOperatorMCCMNC_ConnectionChange", mcc_mnc);
+#endif
+
     UMA_HISTOGRAM_MEDIUM_TIMES(
         "NCN.IPAddressChangeToConnectionTypeChange",
         now - last_ip_address_change_);
 
     offline_packets_received_ = 0;
     bytes_read_since_last_connection_change_ = 0;
     peak_kbps_since_last_connection_change_ = 0;
     last_connection_type_ = type;
     polling_interval_ = base::TimeDelta::FromSeconds(1);
   }
@@ skipping 501 matching lines @@
   DCHECK(g_network_change_notifier);
   g_network_change_notifier = NULL;
 }
 
 NetworkChangeNotifier::DisableForTest::~DisableForTest() {
   DCHECK(!g_network_change_notifier);
   g_network_change_notifier = network_change_notifier_;
 }
 
 }  // namespace net