Update from https://crrev.com/306655

net/dns/dns_session.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_SESSION_H_
 #define NET_DNS_DNS_SESSION_H_
 
 #include <vector>
 
 #include "base/lazy_instance.h"
@@ skipping 48 matching lines @@
 
   DnsSession(const DnsConfig& config,
              scoped_ptr<DnsSocketPool> socket_pool,
              const RandIntCallback& rand_int_callback,
              NetLog* net_log);
 
   const DnsConfig& config() const { return config_; }
   NetLog* net_log() const { return net_log_; }
 
   // Return the next random query ID.
-  int NextQueryId() const;
+  uint16 NextQueryId() const;
 
   // Return the index of the first configured server to use on first attempt.
   unsigned NextFirstServerIndex();
 
   // Start with |server_index| and find the index of the next known good server
   // to use on this attempt. Returns |server_index| if this server has no
   // recorded failures, or if there are no other servers that have not failed
   // or have failed longer time ago.
   unsigned NextGoodServerIndex(unsigned server_index);
 
@@ skipping 58 matching lines @@
     RttBuckets();
   };
   static base::LazyInstance<RttBuckets>::Leaky rtt_buckets_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsSession);
 };
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_SESSION_H_