Remove key exchange code from JingleSession.

remoting/protocol/content_description.h

 // Copyright (c) 2011 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_CONTENT_DESCRIPTION_H_
 #define REMOTING_PROTOCOL_CONTENT_DESCRIPTION_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 10 matching lines @@
 
 // ContentDescription used for chromoting sessions. It contains the information
 // from the content description stanza in the session intialization handshake.
 //
 // This class also provides a type abstraction so that the Chromotocol Session
 // interface does not need to depend on libjingle.
 class ContentDescription : public cricket::ContentDescription {
  public:
   ContentDescription(const CandidateSessionConfig* config,
                      const std::string& auth_token,
-                     const std::string& master_key,
                      const std::string& certificate);
   virtual ~ContentDescription();
 
   const CandidateSessionConfig* config() const {
     return candidate_config_.get();
   }
 
   const std::string& auth_token() const { return auth_token_; }
-  const std::string& master_key() const { return master_key_; }
   const std::string& certificate() const { return certificate_; }
 
   buzz::XmlElement* ToXml() const;
 
   static cricket::ContentDescription* ParseXml(const buzz::XmlElement* element);
 
  private:
   scoped_ptr<const CandidateSessionConfig> candidate_config_;
 
   // This may contain the initiating, or the accepting token depending on
   // context.
   std::string auth_token_;
 
-  // Master key used for the session encrypted with the hosts key.
-  std::string master_key_;
-
   std::string certificate_;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONTENT_DESCRIPTION_H_