Add DiscoveryNetworkMonitor implementation

chrome/browser/extensions/api/dial/dial_api.h

Index: chrome/browser/extensions/api/dial/dial_api.h
diff --git a/chrome/browser/extensions/api/dial/dial_api.h b/chrome/browser/extensions/api/dial/dial_api.h
index 1aba1c75a70a08b9e6ee504004dcebfcb7535b30..07fd84b70c038dc526d3c1e3b788f9a9ee2e6066 100644
--- a/chrome/browser/extensions/api/dial/dial_api.h
+++ b/chrome/browser/extensions/api/dial/dial_api.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "chrome/browser/extensions/api/dial/dial_device_data.h"
 #include "chrome/browser/extensions/api/dial/dial_registry.h"
+#include "chrome/browser/net/discovery_network_monitor.h"
 #include "chrome/common/extensions/api/dial.h"
 #include "components/keyed_service/core/refcounted_keyed_service.h"
 #include "extensions/browser/api/async_api_function.h"
@@ -157,6 +158,25 @@ class DialFetchDeviceDescriptionFunction : public AsyncExtensionFunction {
   DISALLOW_COPY_AND_ASSIGN(DialFetchDeviceDescriptionFunction);
 };
 
+class DialGetNetworkIdFunction : public AsyncExtensionFunction {

[imcheng, 2017/03/14 22:45:34]

Mark - I don't believe we need this anymore. The network change monitor will
only be used in browser code. Is that correct?

[mark a. foltz, 2017/03/18 19:58:21]

It's up to you - if we add this, we could test it in the current component (and
possibly get performance benefits by removing other event listeners.

[btolsch, 2017/04/03 10:16:35]

I removee it since it sounds like it would only be used temporarily.

+ public:
+  DialGetNetworkIdFunction();
+
+ protected:
+  ~DialGetNetworkIdFunction() override;
+
+  // AsyncExtensionFunction:
+  bool RunAsync() override;
+
+ private:
+  DECLARE_EXTENSION_FUNCTION("dial.getNetworkId", DIAL_GETNETWORKID)
+
+  void GetNetworkIdOnIOThread();
+  void NetworkIdCallback();
+
+  DISALLOW_COPY_AND_ASSIGN(DialGetNetworkIdFunction);
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_API_H_