Remove QUIC support from remoting host and client.

remoting/client/plugin/chromoting_instance.cc

Index: remoting/client/plugin/chromoting_instance.cc
diff --git a/remoting/client/plugin/chromoting_instance.cc b/remoting/client/plugin/chromoting_instance.cc
index eef2a20718201c8fa7857bbb249f19a42a3a47c8..13fe3422893fa39868f578f3f2f6dc2ed2a52d8a 100644
--- a/remoting/client/plugin/chromoting_instance.cc
+++ b/remoting/client/plugin/chromoting_instance.cc
@@ -727,10 +727,6 @@ void ChromotingInstance::HandleConnect(const base::DictionaryValue& data) {
       experiments_list.end()) {
     config->set_vp9_experiment_enabled(true);
   }
-  if (std::find(experiments_list.begin(), experiments_list.end(), "quic") !=
-      experiments_list.end()) {
-    config->PreferTransport(protocol::ChannelConfig::TRANSPORT_QUIC_STREAM);
-  }
   client_->set_protocol_config(config.Pass());
 
   // Kick off the connection.