Use GUID instead of ServicePath in networkingPrivate API

components/wifi/fake_wifi_service.cc

Index: components/wifi/fake_wifi_service.cc
diff --git a/components/wifi/fake_wifi_service.cc b/components/wifi/fake_wifi_service.cc
index 86b635873bbf976b6608933731350465033e028c..87b01a4fd24af12f1c340fbc82a84eb1f083a54d 100644
--- a/components/wifi/fake_wifi_service.cc
+++ b/components/wifi/fake_wifi_service.cc
@@ -69,11 +69,11 @@ void FakeWiFiService::GetProperties(const std::string& network_guid,
                                     std::string* error) {
   WiFiService::NetworkList::iterator network_properties =
       FindNetwork(network_guid);
-  if (network_properties != networks_.end()) {
-    properties->Swap(network_properties->ToValue(false).get());
-  } else {
-    *error = "Error.DBusFailed";
+  if (network_properties == networks_.end()) {
+    *error = "Error.InvalidNetworkGuid";
+    return;
   }
+  properties->Swap(network_properties->ToValue(false).get());
 }
 
 void FakeWiFiService::GetManagedProperties(
@@ -90,7 +90,7 @@ void FakeWiFiService::GetState(const std::string& network_guid,
   WiFiService::NetworkList::iterator network_properties =
       FindNetwork(network_guid);
   if (network_properties == networks_.end()) {
-    *error = "Error.InvalidParameter";
+    *error = "Error.InvalidNetworkGuid";
     return;
   }
   properties->Swap(network_properties->ToValue(true).get());
@@ -143,29 +143,29 @@ void FakeWiFiService::RequestNetworkScan() {
 void FakeWiFiService::StartConnect(const std::string& network_guid,
                                    std::string* error) {
   NetworkList::iterator network_properties = FindNetwork(network_guid);
-  if (network_properties != networks_.end()) {
-    DisconnectAllNetworksOfType(network_properties->type);
-    network_properties->connection_state = onc::connection_state::kConnected;
-    SortNetworks();
-    NotifyNetworkListChanged(networks_);
-    NotifyNetworkChanged(network_guid);
-  } else {
-    *error = "configure-failed";
+  if (network_properties == networks_.end()) {
+    *error = "Error.InvalidNetworkGuid";
+    return;
   }
+  DisconnectAllNetworksOfType(network_properties->type);
+  network_properties->connection_state = onc::connection_state::kConnected;
+  SortNetworks();
+  NotifyNetworkListChanged(networks_);
+  NotifyNetworkChanged(network_guid);
 }
 
 void FakeWiFiService::StartDisconnect(const std::string& network_guid,
                                       std::string* error) {
   WiFiService::NetworkList::iterator network_properties =
       FindNetwork(network_guid);
-  if (network_properties != networks_.end()) {
-    network_properties->connection_state = onc::connection_state::kNotConnected;
-    SortNetworks();
-    NotifyNetworkListChanged(networks_);
-    NotifyNetworkChanged(network_guid);
-  } else {
-    *error = "not-found";
+  if (network_properties == networks_.end()) {
+    *error = "Error.InvalidNetworkGuid";
+    return;
   }
+  network_properties->connection_state = onc::connection_state::kNotConnected;
+  SortNetworks();
+  NotifyNetworkListChanged(networks_);
+  NotifyNetworkChanged(network_guid);
 }
 
 void FakeWiFiService::GetKeyFromSystem(const std::string& network_guid,