[net] Move DnsConfigService to NetworkChangeNotifier.

net/dns/dns_test_util.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_TEST_UTIL_H_
 #define NET_DNS_DNS_TEST_UTIL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 171 matching lines @@
   uint16 qtype;
   Result result;
 };
 
 typedef std::vector<MockDnsClientRule> MockDnsClientRuleList;
 
 // Creates mock DnsClient for testing HostResolverImpl.
 scoped_ptr<DnsClient> CreateMockDnsClient(const DnsConfig& config,
                                           const MockDnsClientRuleList& rules);
 
-class MockDnsConfigService : public DnsConfigService {
- public:
-  virtual ~MockDnsConfigService();
-
-  // NetworkChangeNotifier::DNSObserver:
-  virtual void OnDNSChanged(unsigned detail) OVERRIDE;
-
-  // Expose the protected methods for tests.
-  void ChangeConfig(const DnsConfig& config);
-  void ChangeHosts(const DnsHosts& hosts);
-};
-
-
 }  // namespace net
 
 #endif  // NET_DNS_DNS_TEST_UTIL_H_