Make HPACK static table static and immutable.

net/spdy/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 <map>
 #include <string>
 #include <vector>
@@ skipping 48 matching lines @@
   // Sets externally-owned storage for aggregating character counts of emitted
   // literal representations.
   void SetCharCountsStorage(std::vector<size_t>* char_counts,
                             size_t* total_char_counts);
 
  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(HpackEntry* entry);
+  void EmitIndex(const HpackEntry* entry);
 
   // Emits a literal representation (Section 7.2).
   void EmitIndexedLiteral(const Representation& representation);
   void EmitNonIndexedLiteral(const Representation& representation);
   void EmitLiteral(const Representation& representation);
 
   // Emits a Huffman or identity string (whichever is smaller).
   void EmitString(base::StringPiece str);
 
   void UpdateCharacterCounts(base::StringPiece str);
@@ skipping 11 matching lines @@
   // Externally-owned, nullable storage for character counts of literals.
   std::vector<size_t>* char_counts_;
   size_t* total_char_counts_;
 
   DISALLOW_COPY_AND_ASSIGN(HpackEncoder);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_ENCODER_H_