Add Windows and Mac network list implementation

chrome/browser/media/router/discovery/BUILD.gn

Index: chrome/browser/media/router/discovery/BUILD.gn
diff --git a/chrome/browser/media/router/discovery/BUILD.gn b/chrome/browser/media/router/discovery/BUILD.gn
index 322ffe9af33f35e787a39a952ef8b4777c51c7bc..89e80eb06b26accb9ec0b1c8dd8f7903c95bd890 100644
--- a/chrome/browser/media/router/discovery/BUILD.gn
+++ b/chrome/browser/media/router/discovery/BUILD.gn
@@ -42,9 +42,19 @@ static_library("discovery") {
       "discovery_network_list_posix.cc",
       "discovery_network_list_wifi.h",
       "discovery_network_list_wifi_linux.cc",
+      "discovery_network_list_wifi_mac.mm",
       "discovery_network_list_win.cc",
       "discovery_network_monitor.cc",
       "discovery_network_monitor.h",
     ]
   }
+
+  if (is_win) {
+    libs = [ "wlanapi.lib" ]
+    ldflags = [ "/DELAYLOAD:wlanapi.dll" ]
+  }
+
+  if (is_mac) {
+    libs = [ "CoreWLAN.framework" ]
+  }
 }