Add DiscoveryNetworkMonitor implementation

chrome/browser/media/router/discovery/discovery_network_info.h

Index: chrome/browser/media/router/discovery/discovery_network_info.h
diff --git a/chrome/browser/media/router/discovery/discovery_network_info.h b/chrome/browser/media/router/discovery/discovery_network_info.h
new file mode 100644
index 0000000000000000000000000000000000000000..363d9a11ac1d11fae4b53a1623fd6a01d659f23b
--- /dev/null
+++ b/chrome/browser/media/router/discovery/discovery_network_info.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2017 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 CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DISCOVERY_NETWORK_INFO_H_
+#define CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DISCOVERY_NETWORK_INFO_H_
+
+#include <string>
+
+// Represents a single network interface that can be used for local discovery.
+struct DiscoveryNetworkInfo {
+ public:
+  DiscoveryNetworkInfo();
+  DiscoveryNetworkInfo(const std::string& name, const std::string& network_id);
+  ~DiscoveryNetworkInfo();
+
+  DiscoveryNetworkInfo(const DiscoveryNetworkInfo&);
+  DiscoveryNetworkInfo& operator=(const DiscoveryNetworkInfo&);
+
+  bool operator==(const DiscoveryNetworkInfo&) const;
+  bool operator!=(const DiscoveryNetworkInfo&) const;
+
+  // The name of the network interface.  e.g. eth0, wlan0
+  std::string name;
+  // Some form of identifier for the network to which this interface is
+  // connected.  For WiFi, we assume the associated SSID identifies the
+  // connected network.  For Ethernet, we assume that the network remains the
+  // same for the interface (until disconnected), so we use the interface's MAC
+  // address to identify the network.
+  std::string network_id;
+};
+
+#endif  // CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DISCOVERY_NETWORK_INFO_H_