Use metadata annotation @patch for patch classes

runtime/lib/developer.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:isolate';
 
-patch bool debugger({bool when: true,
+@patch bool debugger({bool when: true,
                      String message}) native "Developer_debugger";
 
-patch Object inspect(Object object) native "Developer_inspect";
+@patch Object inspect(Object object) native "Developer_inspect";
 
-patch void log(String message,
-               {DateTime time,
-                int sequenceNumber,
-                int level: 0,
-                String name: '',
-                Zone zone,
-                Object error,
-                StackTrace stackTrace}) {
+@patch void log(String message,
+                {DateTime time,
+                 int sequenceNumber,
+                 int level: 0,
+                 String name: '',
+                 Zone zone,
+                 Object error,
+                 StackTrace stackTrace}) {
   if (message is! String) {
     throw new ArgumentError(message, "message", "Must be a String");
   }
   if (time == null) {
     time = new DateTime.now();
   }
   if (time is! DateTime) {
     throw new ArgumentError(time, "time", "Must be a DateTime");
   }
   if (sequenceNumber == null) {
@@ skipping 15 matching lines @@
 
 _log(String message,
      int timestamp,
      int sequenceNumber,
      int level,
      String name,
      Zone zone,
      Object error,
      StackTrace stackTrace) native "Developer_log";
 
-patch void _postEvent(String eventKind, String eventData)
+@patch void _postEvent(String eventKind, String eventData)
     native "Developer_postEvent";
 
-patch ServiceExtensionHandler _lookupExtension(String method)
+@patch ServiceExtensionHandler _lookupExtension(String method)
     native "Developer_lookupExtension";
 
-patch _registerExtension(String method, ServiceExtensionHandler handler)
+@patch _registerExtension(String method, ServiceExtensionHandler handler)
     native "Developer_registerExtension";
 
 // This code is only invoked when there is no other Dart code on the stack.
 _runExtension(ServiceExtensionHandler handler,
               String method,
               List<String> parameterKeys,
               List<String> parameterValues,
               SendPort replyPort,
               Object id,
               bool trace_service) {
@@ skipping 69 matching lines @@
     sb.write('"result":');
   }
   sb.write('${response._toString()},');
   if (id is String) {
     sb.write('"id":"$id"}');
   } else {
     sb.write('"id":$id}');
   }
   replyPort.send(sb.toString());
 }