Change IPEndpoint::address() to return a net::IPAddress

net/base/ip_address.h

 // Copyright (c) 2015 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_IP_ADDRESS_NET_H_
 #define NET_BASE_IP_ADDRESS_NET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 61 matching lines @@
 
   // Parses an IP address literal (either IPv4 or IPv6) to its numeric value.
   // Returns true on success and fills |ip_address| with the numeric value.
   static bool FromIPLiteral(const base::StringPiece& ip_literal,
                             IPAddress* ip_address) WARN_UNUSED_RESULT;
 
   // Returns the underlying byte vector.
   const std::vector<uint8_t>& bytes() const { return ip_address_; };
 
   bool operator==(const IPAddress& that) const;
+  bool operator!=(const IPAddress& that) const;
   bool operator<(const IPAddress& that) const;
 
  private:
   // IPv4 addresses will have length kIPv4AddressSize, whereas IPv6 address
   // will have length kIPv6AddressSize.
   std::vector<uint8_t> ip_address_;
 
   // This class is copyable and assignable.
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_IP_ADDRESS_NET_H_