[net] Move DnsConfigService to NetworkChangeNotifier.

net/base/network_change_notifier_linux.h

Index: net/base/network_change_notifier_linux.h
diff --git a/net/base/network_change_notifier_linux.h b/net/base/network_change_notifier_linux.h
index ba45b0b26aad4aaf924103b4f08f29808abb1755..1b3f376fb0b695b73fa816163ab7d791433a3824 100644
--- a/net/base/network_change_notifier_linux.h
+++ b/net/base/network_change_notifier_linux.h
@@ -40,7 +40,7 @@ class NET_EXPORT_PRIVATE NetworkChangeNotifierLinux
   // The thread used to listen for notifications.  This relays the notification
   // to the registered observers without posting back to the thread the object
   // was created on.
-  // Also used for DnsConfigWatcher which requires TYPE_IO message loop.
+  // Also used for DnsConfigService which requires TYPE_IO message loop.
   scoped_ptr<Thread> notifier_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierLinux);