Move GetVisibleNetworks network type filtering to WiFiService interface.

chrome/utility/wifi/wifi_service_mock.cc

Index: chrome/utility/wifi/wifi_service_mock.cc
diff --git a/chrome/utility/wifi/wifi_service_mock.cc b/chrome/utility/wifi/wifi_service_mock.cc
index aa4bec5d3c10da299e2fdc58ec07156c554327d6..3c7257f90653c78dbb8ddc6dbaf892ce7aef7217 100644
--- a/chrome/utility/wifi/wifi_service_mock.cc
+++ b/chrome/utility/wifi/wifi_service_mock.cc
@@ -113,9 +113,20 @@ class WiFiServiceMock : public WiFiService {
   }
 
   virtual void GetVisibleNetworks(
+      const std::string& network_type,
       const NetworkListCallback& callback,
       const ErrorCallback& error_callback) OVERRIDE {
-    callback.Run(networks_);
+    if (network_type.empty() || network_type == onc::network_type::kAllTypes) {
+      callback.Run(networks_);
+    } else {
+      NetworkList filtered_networks;
+      for (NetworkList::iterator it = networks_.begin(); it != networks_.end();
+           ++it) {
+        if (it->type == network_type)
+          filtered_networks.push_back(*it);
+      }
+      callback.Run(filtered_networks);
+    }
   }
 
   virtual void RequestNetworkScan() OVERRIDE {}