[GCM] Support actual check-in in mcs_probe

google_apis/gcm/engine/connection_factory_impl.cc

Index: google_apis/gcm/engine/connection_factory_impl.cc
diff --git a/google_apis/gcm/engine/connection_factory_impl.cc b/google_apis/gcm/engine/connection_factory_impl.cc
index b9e7f4f1a767722f688bd77ed0bb467bbe55d24c..bc416f8f306fcd201a80fa29548aa8b4c2911c2d 100644
--- a/google_apis/gcm/engine/connection_factory_impl.cc
+++ b/google_apis/gcm/engine/connection_factory_impl.cc
@@ -99,7 +99,6 @@ ConnectionHandler* ConnectionFactoryImpl::GetConnectionHandler() const {
 
 void ConnectionFactoryImpl::Connect() {
   DCHECK(connection_handler_);
-  DCHECK(!IsEndpointReachable());
 
   connecting_ = true;
   if (backoff_entry_->ShouldRejectRequest()) {
@@ -166,8 +165,6 @@ void ConnectionFactoryImpl::OnIPAddressChanged() {
 }
 
 void ConnectionFactoryImpl::ConnectImpl() {
-  DCHECK(!IsEndpointReachable());
-
   if (socket_handle_.socket() && socket_handle_.socket()->IsConnected())
     socket_handle_.socket()->Disconnect();
   socket_handle_.Reset();