Align base::hash_map with C++11.

net/dns/dns_hosts.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_DNS_DNS_HOSTS_H_
 #define NET_DNS_DNS_HOSTS_H_
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
 #include "net/base/address_family.h"
 #include "net/base/net_export.h"
 #include "net/base/net_util.h"  // can't forward-declare IPAddressNumber
 
 namespace net {
   typedef std::pair<std::string, AddressFamily> DnsHostsKey;
 };
 
 namespace BASE_HASH_NAMESPACE {
-#if defined(COMPILER_GCC)
 
 template<>
 struct hash<net::DnsHostsKey> {
   std::size_t operator()(const net::DnsHostsKey& key) const {
     hash<base::StringPiece> string_piece_hash;
     return string_piece_hash(key.first) + key.second;
   }
 };
 
-#elif defined(COMPILER_MSVC)
-
-inline size_t hash_value(const net::DnsHostsKey& key) {
-  return hash_value(key.first) + key.second;
-}
-
-#endif  // COMPILER
-
 }  // namespace BASE_HASH_NAMESPACE
 
 namespace net {
 
 // There are OS-specific variations in how commas in the hosts file behave.
 enum ParseHostsCommaMode {
   // Comma is treated as part of a hostname:
   // "127.0.0.1 foo,bar" parses as "foo,bar" mapping to "127.0.0.1".
   PARSE_HOSTS_COMMA_IS_TOKEN,
 
@@ skipping 37 matching lines @@
 // As above but reads the file pointed to by |path|.
 bool NET_EXPORT_PRIVATE ParseHostsFile(const base::FilePath& path,
                                        DnsHosts* dns_hosts);
 
 
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_HOSTS_H_