QUIC - add instrumentation to HPACK.

net/spdy/hpack/hpack_entry.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_ENTRY_H_
 #define NET_SPDY_HPACK_ENTRY_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 55 matching lines @@
 
   // Used to compute the entry's index in the header table.
   size_t InsertionIndex() const { return insertion_index_; }
 
   // Returns the size of an entry as defined in 5.1.
   static size_t Size(base::StringPiece name, base::StringPiece value);
   size_t Size() const;
 
   std::string GetDebugString() const;
 
+  int64_t time_added() const { return time_added_; }
+  void set_time_added(int64_t now) { time_added_ = now; }
+
  private:
   enum EntryType {
     LOOKUP,
     DYNAMIC,
     STATIC,
   };
 
   // These members are not used for LOOKUP entries.
   std::string name_;
   std::string value_;
 
   // These members are always valid. For DYNAMIC and STATIC entries, they
   // always point to |name_| and |value_|.
   base::StringPiece name_ref_;
   base::StringPiece value_ref_;
 
   // The entry's index in the total set of entries ever inserted into the header
   // table.
   size_t insertion_index_;
 
   EntryType type_;
+
+  // For HpackHeaderTable::DebugVisitorInterface
+  int64_t time_added_;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_ENTRY_H_