Remove //net (except for Android test stuff) and sdch

net/dns/dns_config_watcher_mac.h

-// Copyright 2014 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 "base/callback_forward.h"
-#include "net/dns/dns_config_service_posix.h"
-#include "net/dns/notify_watcher_mac.h"
-
-namespace net {
-namespace internal {
-
-// Watches DNS configuration on Mac.
-class DnsConfigWatcher {
- public:
-  bool Watch(const base::Callback<void(bool succeeded)>& callback);
-
-  // Returns an error if the DNS configuration is invalid.
-  // Returns CONFIG_PARSE_POSIX_OK otherwise.
-  static ConfigParsePosixResult CheckDnsConfig();
-
- private:
-  NotifyWatcherMac watcher_;
-};
-
-}  // namespace internal
-}  // namespace net