Revert of Convert //net and //chromecast to std::unordered_*

net/tools/net_watcher/net_watcher.cc

 // 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.
 
 // This is a small utility that watches for and logs network changes.
 
 #include <string>
-#include <unordered_set>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_split.h"
@@ skipping 143 matching lines @@
 
   // Just make the main message loop the network loop.
   base::MessageLoopForIO network_loop;
 
   NetWatcher net_watcher;
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   std::string ignored_netifs_str =
       command_line->GetSwitchValueASCII(kIgnoreNetifFlag);
-  std::unordered_set<std::string> ignored_interfaces;
+  base::hash_set<std::string> ignored_interfaces;
   if (!ignored_netifs_str.empty()) {
     for (const std::string& ignored_netif :
          base::SplitString(ignored_netifs_str, ",", base::TRIM_WHITESPACE,
                            base::SPLIT_WANT_ALL)) {
       LOG(INFO) << "Ignoring: " << ignored_netif;
       ignored_interfaces.insert(ignored_netif);
     }
   }
   scoped_ptr<net::NetworkChangeNotifier> network_change_notifier(
       new net::NetworkChangeNotifierLinux(ignored_interfaces));
@@ skipping 36 matching lines @@
   proxy_config_service->RemoveObserver(&net_watcher);
 
   // Uses |network_change_notifier|.
   net::NetworkChangeNotifier::RemoveDNSObserver(&net_watcher);
   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(&net_watcher);
   net::NetworkChangeNotifier::RemoveIPAddressObserver(&net_watcher);
   net::NetworkChangeNotifier::RemoveNetworkChangeObserver(&net_watcher);
 
   return 0;
 }