arc: Provide more logging for network failures.

chrome/browser/chromeos/arc/arc_auth_service.cc

Index: chrome/browser/chromeos/arc/arc_auth_service.cc
diff --git a/chrome/browser/chromeos/arc/arc_auth_service.cc b/chrome/browser/chromeos/arc/arc_auth_service.cc
index 628c2a34e0157afbd680a2d96ca7a4c1a00d9b8c..e25986fe7bc0279cb731da42372608224f85bd75 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.cc
+++ b/chrome/browser/chromeos/arc/arc_auth_service.cc
@@ -56,6 +56,7 @@ ProvisioningResult ConvertArcSignInFailureReasonToProvisioningResult(
     MAP_PROVISIONING_RESULT(CLOUD_PROVISION_FLOW_FAILED);
     MAP_PROVISIONING_RESULT(CLOUD_PROVISION_FLOW_TIMEOUT);
     MAP_PROVISIONING_RESULT(CLOUD_PROVISION_FLOW_INTERNAL_ERROR);
+    MAP_PROVISIONING_RESULT(NO_NETWORK_CONNECTION);
   }
 #undef MAP_PROVISIONING_RESULT
 
@@ -198,6 +199,10 @@ void ArcAuthService::ReportMetrics(mojom::MetricsType metrics_type,
   }
 }
 
+void ArcAuthService::Dummy() {

[Yusuke Sato, 2017/03/01 20:57:09]

same, please move this up.

[khmel, 2017/03/01 21:33:06]

Deprecated, thanks for catching this!

+  NOTREACHED();
+}
+
 void ArcAuthService::OnAccountInfoReady(mojom::AccountInfoPtr account_info) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   auto* instance = ARC_GET_INSTANCE_FOR_METHOD(arc_bridge_service()->auth(),