Provide an API to dart:developer to control the web server hosting the Service Protocol

runtime/lib/developer.dart

Index: runtime/lib/developer.dart
diff --git a/runtime/lib/developer.dart b/runtime/lib/developer.dart
index 4c6ea7d32164545493ee7ab0339b3a12e496a813..e9b90b92ded3041afb672d67694c8e1c4a245bd5 100644
--- a/runtime/lib/developer.dart
+++ b/runtime/lib/developer.dart
@@ -149,3 +149,12 @@ _postResponse(SendPort replyPort,
   }
   replyPort.send(sb.toString());
 }
+
+@patch int _getServiceMajorVersion() native "Developer_getServiceMajorVersion";
+
+@patch int _getServiceMinorVersion() native "Developer_getServiceMinorVersion";
+
+@patch void _getServerInfo(SendPort sp) native "Developer_getServerInfo";
+
+@patch void _webServerControl(SendPort sp, bool enable)
+    native "Developer_webServerControl";