Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/local_discovery/privet_traffic_detector.cc

 // Copyright 2013 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 "chrome/browser/local_discovery/privet_traffic_detector.h"
 
 #include "base/metrics/histogram.h"
 #include "base/sys_byteorder.h"
 #include "net/base/dns_util.h"
 #include "net/base/net_errors.h"
@@ skipping 26 matching lines @@
     }
   }
 
   net::IPAddressNumber localhost_prefix(4, 0);
   localhost_prefix[0] = 127;
   ip4_networks.push_back(net::NetworkInterface("lo", localhost_prefix, 8));
   content::BrowserThread::PostTask(content::BrowserThread::IO, FROM_HERE,
                                    base::Bind(callback, ip4_networks));
 }
 
-bool IsIpPrefixEqual(const net::IPAddressNumber& ip1,
-                     const net::IPAddressNumber& ip2) {
-  return !ip1.empty() && ip1.size() == ip2.size() &&
-         std::equal(ip1.begin(), ip1.end() - 1, ip2.begin());
-}
-
 }  // namespace
 
 namespace local_discovery {
 
 PrivetTrafficDetector::PrivetTrafficDetector(
     net::AddressFamily address_family,
     const base::Closure& on_traffic_detected)
     : on_traffic_detected_(on_traffic_detected),
       callback_runner_(base::MessageLoop::current()->message_loop_proxy()),
       address_family_(address_family),
@@ skipping 125 matching lines @@
                    base::Unretained(this)));
   } while (rv > 0);
 
   if (rv != net::ERR_IO_PENDING)
     return rv;
 
   return net::OK;
 }
 
 }  // namespace local_discovery