Allocate HpackDecoder/Encoder only for SpdyFramer > SPDY3.

net/spdy/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_SPDY_FRAMER_H_
 #define NET_SPDY_SPDY_FRAMER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 683 matching lines @@
   // Scratch space for handling SETTINGS frames.
   // TODO(hkhalil): Unify memory for this scratch space with
   // current_frame_buffer_.
   SpdySettingsScratch settings_scratch_;
 
   bool enable_compression_;  // Controls all compression
   // SPDY header compressors.
   scoped_ptr<z_stream> header_compressor_;
   scoped_ptr<z_stream> header_decompressor_;
 
-  HpackEncoder hpack_encoder_;
-  HpackDecoder hpack_decoder_;
+  scoped_ptr<HpackEncoder> hpack_encoder_;
+  scoped_ptr<HpackDecoder> hpack_decoder_;
 
   SpdyFramerVisitorInterface* visitor_;
   SpdyFramerDebugVisitorInterface* debug_visitor_;
 
   std::string display_protocol_;
 
   // The major SPDY version to be spoken/understood by this framer.
   const SpdyMajorVersion spdy_version_;
 
   // Tracks if we've ever gotten far enough in framing to see a control frame of
@@ skipping 20 matching lines @@
   // If a HEADERS frame is followed by a CONTINUATION frame, the FIN/END_STREAM
   // flag is still carried in the HEADERS frame. If it's set, flip this so that
   // we know to terminate the stream when the entire header block has been
   // processed.
   bool end_stream_when_done_;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_FRAMER_H_