Lazily alloc/init the HPACK encoder/decoder.

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 574 matching lines @@
   bool ProcessSetting(const char* data);
 
   // Retrieve serialized length of SpdyHeaderBlock. If compression is enabled, a
   // maximum estimate is returned.
   size_t GetSerializedLength(const SpdyHeaderBlock& headers);
 
   // Get (and lazily initialize) the ZLib state.
   z_stream* GetHeaderCompressor();
   z_stream* GetHeaderDecompressor();
 
+  // Get (and lazily initialize) the HPACK state.
+  HpackEncoder* GetHpackEncoder();
+  HpackDecoder* GetHpackDecoder();
+
   size_t GetNumberRequiredContinuationFrames(size_t size);
 
   void WritePayloadWithContinuation(SpdyFrameBuilder* builder,
                                     const std::string& hpack_encoding,
                                     SpdyStreamId stream_id,
                                     SpdyFrameType type);
 
  private:
   // Deliver the given control frame's uncompressed headers block to the
   // visitor in chunks. Returns true if the visitor has accepted all of the
@@ skipping 131 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_