Add initial Random Access File information to Observatory

runtime/bin/service_object_patch.dart

 // Copyright (c) 2014, 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.
 
 
 final Map _servicePathMap = {
   'http' : {
     'servers' : _httpServersServiceObject
+  },
+  'file' : {
+    'randomaccessfiles' : _randomAccessFilesServiceObject
   }
 };
 
 String _serviceObjectHandler(List<String> paths,
                              List<String> keys,
                              List<String> values) {
   assert(keys.length == values.length);
   badPath() {
     throw "Invalid path '${paths.join("/")}'";
   }
@@ skipping 33 matching lines @@
     }
     return server._toJSON(false);
   }
   return {
     'id': 'io/http/servers',
     'type': 'HttpServerList',
     'members': _HttpServer._servers.values
         .map((server) => server._toJSON(true)).toList(),
   };
 }
+
+Map _randomAccessFilesServiceObject(args) {
+  if (args.length == 1) {
+    var raf = _RandomAccessFile._files[int.parse(args.first)];
+    if (raf == null) {
+      return {};
+    }
+    return raf._toJSON(false);
+  }
+  return {
+    'id': 'io/file/randomaccessfiles',
+    'type': 'RandomAccessFileList',
+    'members': _RandomAccessFile._files.values
+        .map((raf) => raf._toJSON(true)).toList(),
+  };
+}
+