Enable QUIC support in chromoting

remoting/protocol/session_config.h

Index: remoting/protocol/session_config.h
diff --git a/remoting/protocol/session_config.h b/remoting/protocol/session_config.h
index 0168a97eb69a1381ee6f6c5914ac1328aa7afa8b..6885de85940669cedd71d05391a901b764faab20 100644
--- a/remoting/protocol/session_config.h
+++ b/remoting/protocol/session_config.h
@@ -23,6 +23,7 @@ struct ChannelConfig {
   enum TransportType {
     TRANSPORT_STREAM,
     TRANSPORT_MUX_STREAM,
+    TRANSPORT_QUIC_STREAM,
     TRANSPORT_DATAGRAM,
     TRANSPORT_NONE,
   };
@@ -92,6 +93,14 @@ class SessionConfig {
     return audio_config_.transport != ChannelConfig::TRANSPORT_NONE;
   }
 
+  // Returns true if any of the channels is using QUIC.
+  bool is_using_quic() const {
+    return control_config_.transport == ChannelConfig::TRANSPORT_QUIC_STREAM ||
+           event_config_.transport == ChannelConfig::TRANSPORT_QUIC_STREAM ||
+           video_config_.transport == ChannelConfig::TRANSPORT_QUIC_STREAM ||
+           audio_config_.transport == ChannelConfig::TRANSPORT_QUIC_STREAM;
+  }
+
  private:
   SessionConfig();
 
@@ -169,6 +178,7 @@ class CandidateSessionConfig {
 
   // Helpers for enabling/disabling specific features.
   void DisableAudioChannel();
+  void PreferTransport(ChannelConfig::TransportType transport);
 
  private:
   CandidateSessionConfig();