[chrome.dial] [WIP] Adds an API to get the active network ID.

chrome/browser/extensions/api/dial/discovery_network_monitor.cc

Index: chrome/browser/extensions/api/dial/discovery_network_monitor.cc
diff --git a/chrome/browser/extensions/api/dial/discovery_network_monitor.cc b/chrome/browser/extensions/api/dial/discovery_network_monitor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..707c1dbdd85b481d1733e320018b85419f4073b4
--- /dev/null
+++ b/chrome/browser/extensions/api/dial/discovery_network_monitor.cc
@@ -0,0 +1,16 @@
+// Copyright (c) 2016 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/dial/discovery_network_monitor.h"
+
+namespace extensions {
+
+NetworkInfo::NetworkInfo() { }
+
+DiscoveryNetworkMonitor::DiscoveryNetworkMonitor() { }
+
+DiscoveryNetworkMonitor::~DiscoveryNetworkMonitor() { }
+
+
+}  // namespace extensions