Add TransportContext class.

remoting/protocol/connection_to_host_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_CONNECTION_TO_HOST_IMPL_H_
 #define REMOTING_PROTOCOL_CONNECTION_TO_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 
@@ skipping 36 matching lines @@
   ConnectionToHostImpl();
   ~ConnectionToHostImpl() override;
 
   // ConnectionToHost interface.
   void set_candidate_config(scoped_ptr<CandidateSessionConfig> config) override;
   void set_client_stub(ClientStub* client_stub) override;
   void set_clipboard_stub(ClipboardStub* clipboard_stub) override;
   void set_video_stub(VideoStub* video_stub) override;
   void set_audio_stub(AudioStub* audio_stub) override;
   void Connect(SignalStrategy* signal_strategy,
-               scoped_ptr<TransportFactory> transport_factory,
+               scoped_refptr<TransportContext> transport_context,
                scoped_ptr<Authenticator> authenticator,
                const std::string& host_jid,
                HostEventCallback* event_callback) override;
   const SessionConfig& config() override;
   ClipboardStub* clipboard_forwarder() override;
   HostStub* host_stub() override;
   InputStub* input_stub() override;
   State state() const override;
 
  private:
@@ skipping 60 matching lines @@
   ErrorCode error_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConnectionToHostImpl);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONNECTION_TO_HOST_IMPL_H_