Remove already obsolete CREDENTIAL frame from SPDY code.

net/spdy/buffered_spdy_framer.h

 // Copyright (c) 2012 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 NET_SPDY_BUFFERED_SPDY_FRAMER_H_
 #define NET_SPDY_BUFFERED_SPDY_FRAMER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 282 matching lines @@
   // buffer up from the spdy framer.
   struct ControlFrameFields {
     SpdyFrameType type;
     SpdyStreamId stream_id;
     SpdyStreamId associated_stream_id;
     SpdyStreamId promised_stream_id;
     bool has_priority;
     SpdyPriority priority;
     SpdyStreamId parent_stream_id;
     bool exclusive;
-    uint8 credential_slot;
     bool fin;
     bool unidirectional;
   };
   scoped_ptr<ControlFrameFields> control_frame_fields_;
 
   // Collection of fields of a GOAWAY frame that this class needs to buffer.
   struct GoAwayFields {
     SpdyStreamId last_accepted_stream_id;
     SpdyGoAwayStatus status;
     std::string debug_data;
   };
   scoped_ptr<GoAwayFields> goaway_fields_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedSpdyFramer);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_BUFFERED_SPDY_FRAMER_H_