dart:developer service extension fixes

runtime/observatory/tests/service/tcp_socket_service_test.dart

Index: runtime/observatory/tests/service/tcp_socket_service_test.dart
diff --git a/runtime/observatory/tests/service/tcp_socket_service_test.dart b/runtime/observatory/tests/service/tcp_socket_service_test.dart
index c80cad5626763c4b298195935c205b3911766dd1..646b5f641deaf424f3cc4b5a1ffd3fd2d962ea89 100644
--- a/runtime/observatory/tests/service/tcp_socket_service_test.dart
+++ b/runtime/observatory/tests/service/tcp_socket_service_test.dart
@@ -30,7 +30,8 @@ Future setupTCP() async {
 var tcpTests = [
   // Initial.
   (Isolate isolate) async {
-    var result = await isolate.invokeRpcNoUpgrade('__getOpenSockets', {});
+    var result =
+            await isolate.invokeRpcNoUpgrade('ext.dart.io.getOpenSockets', {});
     expect(result['type'], equals('_opensockets'));
     // We expect 3 sockets to be open (in this order):
     //   The server socket accepting connections, on port X
@@ -48,7 +49,7 @@ var tcpTests = [
     expect(result['data'][2]['name'].startsWith('127.0.0.1:'), isTrue);
 
     var listening = await isolate.invokeRpcNoUpgrade(
-        '__getSocketByID', { 'id' : result['data'][0]['id'] });
+        'ext.dart.io.getSocketByID', { 'id' : result['data'][0]['id'] });
     expect(listening['id'], equals(result['data'][0]['id']));
     expect(listening['listening'], isTrue);
     expect(listening['socketType'], equals('TCP'));
@@ -64,11 +65,11 @@ var tcpTests = [
     expect(listening['remotePort'], equals('NA'));
 
     var client = await isolate.invokeRpcNoUpgrade(
-        '__getSocketByID', { 'id' : result['data'][1]['id'] });
+        'ext.dart.io.getSocketByID', { 'id' : result['data'][1]['id'] });
     expect(client['id'], equals(result['data'][1]['id']));
 
     var server = await isolate.invokeRpcNoUpgrade(
-        '__getSocketByID', { 'id' : result['data'][2]['id'] });
+        'ext.dart.io.getSocketByID', { 'id' : result['data'][2]['id'] });
     expect(server['id'], equals(result['data'][2]['id']));
 
     // We expect the client to be connected on the port and
@@ -115,10 +116,10 @@ var tcpTests = [
     }
 
     var secondClient = await isolate.invokeRpcNoUpgrade(
-        '__getSocketByID', { 'id' : result['data'][3]['id'] });
+        'ext.dart.io.getSocketByID', { 'id' : result['data'][3]['id'] });
     expect(secondClient['id'], equals(result['data'][3]['id']));
     var secondServer = await isolate.invokeRpcNoUpgrade(
-        '__getSocketByID', { 'id' : result['data'][4]['id'] });
+        'ext.dart.io.getSocketByID', { 'id' : result['data'][4]['id'] });
     expect(secondServer['id'], equals(result['data'][4]['id']));
 
     // We expect the client to be connected on the port and