Move GetVisibleNetworks network type filtering to WiFiService interface.

chrome/utility/wifi/wifi_service.h

Index: chrome/utility/wifi/wifi_service.h
diff --git a/chrome/utility/wifi/wifi_service.h b/chrome/utility/wifi/wifi_service.h
index f743786428aaf45231b7ccb2ca454d090f3c699e..e45c07e6023236f8f8c693e6260ad1debd32ca1f 100644
--- a/chrome/utility/wifi/wifi_service.h
+++ b/chrome/utility/wifi/wifi_service.h
@@ -111,9 +111,10 @@ class WiFiService {
                              const StringResultCallback& callback,
                              const ErrorCallback& error_callback) = 0;
 
-  // Get list of visible networks. Run |callback| on success, |error_callback|
-  // on failure.
-  virtual void GetVisibleNetworks(const NetworkListCallback& callback,
+  // Get list of visible networks of |network_type|. Run |callback| on success,
+  // |error_callback| on failure.
+  virtual void GetVisibleNetworks(const std::string& network_type,
+                                  const NetworkListCallback& callback,
                                   const ErrorCallback& error_callback) = 0;
 
   // Request network scan. Send |NetworkListChanged| event on completion.