Refactor StringPiece hash.

net/spdy/hpack/hpack_header_table.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_HEADER_TABLE_H_
 #define NET_SPDY_HPACK_HEADER_TABLE_H_
 
 #include <cstddef>
 #include <deque>
 #include <unordered_map>
 #include <unordered_set>
 
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "net/base/net_export.h"
 #include "net/spdy/hpack/hpack_entry.h"
 
 // All section references below are to http://tools.ietf.org/html/rfc7541.
 
 namespace net {
 
 namespace test {
@@ skipping 14 matching lines @@
 
   struct NET_EXPORT_PRIVATE EntryHasher {
     size_t operator()(const HpackEntry* entry) const;
   };
   struct NET_EXPORT_PRIVATE EntriesEq {
     bool operator()(const HpackEntry* lhs, const HpackEntry* rhs) const;
   };
 
   using UnorderedEntrySet =
       std::unordered_set<HpackEntry*, EntryHasher, EntriesEq>;
-  using NameToEntryMap =
-      std::unordered_map<base::StringPiece,
-                         const HpackEntry*,
-                         BASE_HASH_NAMESPACE::hash<base::StringPiece>>;
+  using NameToEntryMap = std::unordered_map<base::StringPiece,
+                                            const HpackEntry*,
+                                            base::StringPieceHash>;
 
   HpackHeaderTable();
 
   ~HpackHeaderTable();
 
   // Last-acknowledged value of SETTINGS_HEADER_TABLE_SIZE.
   size_t settings_size_bound() const { return settings_size_bound_; }
 
   // Current and maximum estimated byte size of the table, as described in
   // 4.1. Notably, this is /not/ the number of entries in the table.
@@ skipping 78 matching lines @@
   // Total number of table insertions which have occurred. Referenced by
   // IndexOf() for determination of an HpackEntry's table index.
   size_t total_insertions_;
 
   DISALLOW_COPY_AND_ASSIGN(HpackHeaderTable);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_HEADER_TABLE_H_