Initial chrome.mdns API.

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

+// Copyright (c) 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/nsd_registry.h"
+
+namespace extensions {
+
+NsdRegistry::NsdRegistry() {}
+NsdRegistry::~NsdRegistry() {}
+
+void NsdRegistry::AddObserver(NsdObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void NsdRegistry::RemoveObserver(NsdObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void NsdRegistry::RegisterDnsSdListener(std::string service_type) {
+  // TODO(mfoltz): Start DNS-SD service.
+}
+
+void NsdRegistry::UnregisterDnsSdListener(std::string service_type) {
+  // TODO(mfoltz): Stop DNS-SD service.
+}
+
+}  // namespace extensions