Avoids the "re-encode HPACK as SPDY3" step.

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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "net/base/net_export.h"
 #include "net/socket/next_proto.h"
+#include "net/spdy/header_coalescer.h"
 #include "net/spdy/spdy_framer.h"
 #include "net/spdy/spdy_header_block.h"
 #include "net/spdy/spdy_protocol.h"
 
 namespace net {
 
 // Returns the SPDY major version corresponding to the given NextProto
 // value, which must represent a SPDY-like protocol.
 NET_EXPORT_PRIVATE SpdyMajorVersion NextProtoToSpdyMajorVersion(
     NextProto next_proto);
@@ skipping 47 matching lines @@
 
   // Called when the other side has finished sending data on this stream.
   // |stream_id| The stream that was receivin data.
   virtual void OnStreamEnd(SpdyStreamId stream_id) = 0;
 
   // Called when padding is received (padding length field or padding octets).
   // |stream_id| The stream receiving data.
   // |len| The number of padding octets.
   virtual void OnStreamPadding(SpdyStreamId stream_id, size_t len) = 0;
 
-  // Called just before processing the payload of a frame containing header
-  // data. Should return an implementation of SpdyHeadersHandlerInterface that
-  // will receive headers for stream |stream_id|. The caller will not take
-  // ownership of the headers handler. The same instance should be returned
-  // for all header frames comprising a logical header block (i.e. until
-  // OnHeaderFrameEnd() is called with end_headers == true).
-  virtual SpdyHeadersHandlerInterface* OnHeaderFrameStart(
-      SpdyStreamId stream_id) = 0;
-
-  // Called after processing the payload of a frame containing header data.
-  // |end_headers| is true if there will not be any subsequent CONTINUATION
-  // frames.
-  virtual void OnHeaderFrameEnd(SpdyStreamId stream_id, bool end_headers) = 0;
-
   // Called when a SETTINGS frame is received.
   // |clear_persisted| True if the respective flag is set on the SETTINGS frame.
   virtual void OnSettings(bool clear_persisted) = 0;
 
   // Called when an individual setting within a SETTINGS frame has been parsed
   // and validated.
   virtual void OnSetting(SpdySettingsIds id, uint8_t flags, uint32_t value) = 0;
 
   // Called when a SETTINGS frame is received with the ACK flag set.
   virtual void OnSettingsAck() {}
@@ skipping 196 matching lines @@
   std::unique_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;
   };
   std::unique_ptr<GoAwayFields> goaway_fields_;
 
+  std::unique_ptr<HeaderCoalescer> coalescer_;
+
   DISALLOW_COPY_AND_ASSIGN(BufferedSpdyFramer);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_BUFFERED_SPDY_FRAMER_H_