Removing `preference` field from `cricket::Codec`.

webrtc/api/jsepsessiondescription.h

 /*
  *  Copyright 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 54 matching lines @@
       size_t mediasection_index) const;
   virtual bool ToString(std::string* out) const;
 
   // Default video encoder settings. The resolution is the max resolution.
   // TODO(perkj): Implement proper negotiation of video resolution.
   static const int kDefaultVideoCodecId;
   static const int kDefaultVideoCodecFramerate;
   static const char kDefaultVideoCodecName[];
   static const int kMaxVideoCodecWidth;
   static const int kMaxVideoCodecHeight;
-  static const int kDefaultVideoCodecPreference;
 
  private:
   rtc::scoped_ptr<cricket::SessionDescription> description_;
   std::string session_id_;
   std::string session_version_;
   std::string type_;
   std::vector<JsepCandidateCollection> candidate_collection_;
 
   bool GetMediasectionIndex(const IceCandidateInterface* candidate,
                             size_t* index);
   int GetMediasectionIndex(const cricket::Candidate& candidate);
 
   RTC_DISALLOW_COPY_AND_ASSIGN(JsepSessionDescription);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_JSEPSESSIONDESCRIPTION_H_