Make HttpNetworkSession::host_mapping_rules no longer a pointer.

net/base/host_mapping_rules.h

 // Copyright (c) 2011 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_BASE_HOST_MAPPING_RULES_H_
 #define NET_BASE_HOST_MAPPING_RULES_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 class HostPortPair;
 
 class NET_EXPORT_PRIVATE HostMappingRules {
  public:
   HostMappingRules();
+  HostMappingRules(const HostMappingRules& host_mapping_rules);
   ~HostMappingRules();
 
+  HostMappingRules& operator=(const HostMappingRules& host_mapping_rules);
+
   // Modifies |*host_port| based on the current rules. Returns true if
   // |*host_port| was modified, false otherwise.
   bool RewriteHost(HostPortPair* host_port) const;
 
   // Adds a rule to this mapper. The format of the rule can be one of:
   //
   //   "MAP" <hostname_pattern> <replacement_host> [":" <replacement_port>]
   //   "EXCLUDE" <hostname_pattern>
   //
   // The <replacement_host> can be either a hostname, or an IP address literal.
   //
   // Returns true if the rule was successfully parsed and added.
   bool AddRuleFromString(const std::string& rule_string);
 
   // Sets the rules from a comma separated list of rules.
   void SetRulesFromString(const std::string& rules_string);
 
  private:
   struct MapRule;
   struct ExclusionRule;
 
   typedef std::vector<MapRule> MapRuleList;
   typedef std::vector<ExclusionRule> ExclusionRuleList;
 
   MapRuleList map_rules_;
   ExclusionRuleList exclusion_rules_;
-
-  DISALLOW_COPY_AND_ASSIGN(HostMappingRules);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_MAPPING_RULES_H_