Enable UMA log uploads for cellular networks.

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index 5d3094134cc2106451f365ecdd04e3c89ecf2da7..5ef27a0d06b1e08594a48889072f7962ecb83f70 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -272,9 +272,13 @@ void ChromeMetricsServiceClient::Initialize() {
       scoped_ptr<metrics::MetricsProvider>(
           new ExtensionsMetricsProvider(metrics_state_manager_)));
 #endif
-  metrics_service_->RegisterMetricsProvider(
-      scoped_ptr<metrics::MetricsProvider>(new metrics::NetworkMetricsProvider(
-          content::BrowserThread::GetBlockingPool())));
+  scoped_ptr<metrics::NetworkMetricsProvider> network_metrics_provider(
+      new metrics::NetworkMetricsProvider(
+          content::BrowserThread::GetBlockingPool()));
+  metrics_service_->SetConnectionTypeCallback(
+      network_metrics_provider->GetConnectionCallback());
+  metrics_service_->RegisterMetricsProvider(network_metrics_provider.Pass());
+
   metrics_service_->RegisterMetricsProvider(
       scoped_ptr<metrics::MetricsProvider>(new OmniboxMetricsProvider));
   metrics_service_->RegisterMetricsProvider(