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

net/base/ip_address.cc

 // 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.
 
 #include "net/base/ip_address.h"
 
 #include "net/base/ip_address_number.h"
 #include "url/gurl.h"
 #include "url/url_canon_ip.h"
 
@@ skipping 43 matching lines @@
     return false;
 
   std::swap(number, ip_address->ip_address_);
   return true;
 }
 
 bool IPAddress::operator==(const IPAddress& that) const {
   return ip_address_ == that.ip_address_;
 }
 
+bool IPAddress::operator!=(const IPAddress& that) const {
+  return ip_address_ != that.ip_address_;
+}
+
 bool IPAddress::operator<(const IPAddress& that) const {
   // Sort IPv4 before IPv6.
   if (ip_address_.size() != that.ip_address_.size()) {
     return ip_address_.size() < that.ip_address_.size();
   }
 
   return ip_address_ < that.ip_address_;
 }
 
 }  // namespace net