Implement NetworkChangeNotifier::IsCurrentlyOffline() for Mac.

net/base/network_config_watcher_mac.cc

 // Copyright (c) 2010 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_config_watcher_mac.h"
 
 #include <SystemConfiguration/SCDynamicStoreKey.h>
 #include <SystemConfiguration/SCSchemaDefinitions.h>
 #include <algorithm>
 
@@ skipping 60 matching lines @@
   // initialize this, rather than just delaying it by a fixed time.
   const int kInitializationDelayMS = 1000;
   message_loop()->PostDelayedTask(
       FROM_HERE,
       method_factory_.NewRunnableMethod(
           &NetworkConfigWatcherMacThread::InitNotifications),
       kInitializationDelayMS);
 }
 
 void NetworkConfigWatcherMacThread::CleanUp() {
+  delegate_->CleanUp();
   if (!run_loop_source_.get())
     return;
 
   CFRunLoopRemoveSource(CFRunLoopGetCurrent(), run_loop_source_.get(),
                         kCFRunLoopCommonModes);
   run_loop_source_.reset();
 }
 
 void NetworkConfigWatcherMacThread::InitNotifications() {
   // Add a run loop source for a dynamic store to the current run loop.
@@ skipping 22 matching lines @@
   // We create this notifier thread because the notification implementation
   // needs a thread with a CFRunLoop, and there's no guarantee that
   // MessageLoop::current() meets that criterion.
   base::Thread::Options thread_options(MessageLoop::TYPE_UI, 0);
   notifier_thread_->StartWithOptions(thread_options);
 }
 
 NetworkConfigWatcherMac::~NetworkConfigWatcherMac() {}
 
 }  // namespace net