QUIC - add instrumentation to HPACK.

net/spdy/hpack/hpack_encoder.h

 // Copyright 2014 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_HPACK_ENCODER_H_
 #define NET_SPDY_HPACK_ENCODER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 40 matching lines @@
 
   // Called upon a change to SETTINGS_HEADER_TABLE_SIZE. Specifically, this
   // is to be called after receiving (and sending an acknowledgement for) a
   // SETTINGS_HEADER_TABLE_SIZE update from the remote decoding endpoint.
   void ApplyHeaderTableSizeSetting(size_t size_setting);
 
   size_t CurrentHeaderTableSizeSetting() const {
     return header_table_.settings_size_bound();
   }
 
+  void SetHeaderTableDebugVisitor(
+      std::unique_ptr<HpackHeaderTable::DebugVisitorInterface> visitor) {
+    header_table_.set_debug_visitor(std::move(visitor));
+  }
+
  private:
   typedef std::pair<base::StringPiece, base::StringPiece> Representation;
   typedef std::vector<Representation> Representations;
 
   // Emits a static/dynamic indexed representation (Section 7.1).
   void EmitIndex(const HpackEntry* entry);
 
   // Emits a literal representation (Section 7.2).
   void EmitIndexedLiteral(const Representation& representation);
   void EmitNonIndexedLiteral(const Representation& representation);
@@ skipping 21 matching lines @@
   size_t min_table_size_setting_received_;
   bool allow_huffman_compression_;
   bool should_emit_table_size_;
 
   DISALLOW_COPY_AND_ASSIGN(HpackEncoder);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_ENCODER_H_