Use a direct include of the message_loop header in net/, part 1.

net/dns/notify_watcher_mac.h

 // 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.
 
 #ifndef NET_DNS_NOTIFY_WATCHER_MAC_H_
 #define NET_DNS_NOTIFY_WATCHER_MAC_H_
 
 #include "base/callback.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 
 namespace net {
 
 // Watches for notifications from Libnotify and delivers them to a Callback.
 // After failure the watch is cancelled and will have to be restarted.
 class NotifyWatcherMac : public base::MessageLoopForIO::Watcher {
  public:
   // Called on received notification with true on success and false on error.
   typedef base::Callback<void(bool succeeded)> CallbackType;
 
@@ skipping 18 matching lines @@
   int notify_token_;
   CallbackType callback_;
   base::MessageLoopForIO::FileDescriptorWatcher watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(NotifyWatcherMac);
 };
 
 }  // namespace net
 
 #endif  // NET_DNS_NOTIFY_WATCHER_MAC_H_