Log operator code histogram on new metric log

chrome/browser/chrome_browser_metrics_service_observer.cc

+// 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.
+
+#include "chrome/browser/chrome_browser_metrics_service_observer.h"
+
+#include "chrome/browser/metrics/metrics_service.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
+
+ChromeBrowserMetricsServiceObserver::ChromeBrowserMetricsServiceObserver() {
+  MetricsServiceHelper::AddMetricsServiceObserver(this);
+}
+
+ChromeBrowserMetricsServiceObserver::~ChromeBrowserMetricsServiceObserver() {
+  MetricsServiceHelper::RemoveMetricsServiceObserver(this);
+}
+
+void ChromeBrowserMetricsServiceObserver::OnDidCreateMetricsLog() {
+#if defined(OS_ANDROID)
+  net::NetworkChangeNotifier::ConnectionType type =
+      net::NetworkChangeNotifier::GetConnectionType();
+  unsigned mcc_mnc = 0;
+  if (type == net::NetworkChangeNotifier::CONNECTION_2G ||
+      type == net::NetworkChangeNotifier::CONNECTION_3G ||
+      type == net::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_NewMetricsLog", mcc_mnc);
+#endif
+}