[mDns] Move dns_sd_registry from extension/api/mdns to media/router/discovery/mdns

chrome/browser/extensions/api/mdns/dns_sd_delegate.cc

Index: chrome/browser/extensions/api/mdns/dns_sd_delegate.cc
diff --git a/chrome/browser/extensions/api/mdns/dns_sd_delegate.cc b/chrome/browser/extensions/api/mdns/dns_sd_delegate.cc
deleted file mode 100644
index 3dca22b2eac68eaecda6c8029660a04d9d7ae64d..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/api/mdns/dns_sd_delegate.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2013 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 "chrome/browser/extensions/api/mdns/dns_sd_delegate.h"
-
-namespace extensions {
-
-DnsSdService::DnsSdService() {}
-DnsSdService::DnsSdService(const DnsSdService& other) = default;
-DnsSdService::~DnsSdService() {}
-
-}  // namespace extensions