Rename network_prefix to prefix_length in NetworkInterface structure

extensions/browser/api/system_network/system_network_api.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 "extensions/browser/api/system_network/system_network_api.h"
 
 namespace {
 const char kNetworkListError[] = "Network lookup failed or unsupported";
 }  // namespace
 
@@ skipping 52 matching lines @@
   std::vector<linked_ptr<core_api::system_network::NetworkInterface> >
       create_arg;
   create_arg.reserve(interface_list.size());
   for (net::NetworkInterfaceList::const_iterator i = interface_list.begin();
        i != interface_list.end();
        ++i) {
     linked_ptr<core_api::system_network::NetworkInterface> info =
         make_linked_ptr(new core_api::system_network::NetworkInterface);
     info->name = i->name;
     info->address = net::IPAddressToString(i->address);
-    info->prefix_length = i->network_prefix;
+    info->prefix_length = i->prefix_length;
     create_arg.push_back(info);
   }
 
   results_ = core_api::system_network::GetNetworkInterfaces::Results::Create(
       create_arg);
   SendResponse(true);
 }
 
 }  // namespace core_api
 }  // namespace extensions