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

net/base/network_change_notifier.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.
 
 #include "net/base/network_change_notifier.h"
 
 #include <limits>
-#include <unordered_set>
 
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "build/build_config.h"
 #include "net/base/network_change_notifier_factory.h"
 #include "net/base/network_interfaces.h"
 #include "net/base/url_util.h"
@@ skipping 503 matching lines @@
 #elif defined(OS_CHROMEOS) || defined(OS_ANDROID)
   // ChromeOS and Android builds MUST use their own class factory.
 #if !defined(OS_CHROMEOS)
   // TODO(oshima): ash_shell do not have access to chromeos'es
   // notifier yet. Re-enable this when chromeos'es notifier moved to
   // chromeos root directory. crbug.com/119298.
   CHECK(false);
 #endif
   return NULL;
 #elif defined(OS_LINUX)
-  return new NetworkChangeNotifierLinux(std::unordered_set<std::string>());
+  return new NetworkChangeNotifierLinux(base::hash_set<std::string>());
 #elif defined(OS_MACOSX)
   return new NetworkChangeNotifierMac();
 #else
   NOTIMPLEMENTED();
   return NULL;
 #endif
 }
 
 // static
 NetworkChangeNotifier::ConnectionType
@@ skipping 626 matching lines @@
 
 NetworkChangeNotifier::DisableForTest::~DisableForTest() {
   DCHECK(!g_network_change_notifier);
   g_network_change_notifier = network_change_notifier_;
 }
 
 void NetworkChangeNotifier::DNSObserver::OnInitialDNSConfigRead() {
 }
 
 }  // namespace net