privatize and remove some fields in Isolate response

runtime/observatory/lib/src/service/object.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.
 
 part of service;
 
 /// An RpcException represents an exceptional event that happened
 /// while invoking an rpc.
 abstract class RpcException implements Exception {
   RpcException(this.message);
@@ skipping 976 matching lines @@
     name = map['name'];
     vmName = map['name'];
     number = int.parse(map['number'], onError:(_) => null);
     if (mapIsRef) {
       return;
     }
     _loaded = true;
     loading = false;
 
     _upgradeCollection(map, isolate);
-    if (map['rootLib'] == null ||
-        map['timers'] == null ||
-        map['heaps'] == null) {
-      Logger.root.severe("Malformed 'Isolate' response: $map");
-      return;
-    }
     rootLibrary = map['rootLib'];
     if (map['entry'] != null) {
       entry = map['entry'];
     }
     var startTimeInMillis = map['startTime'];
     startTime = new DateTime.fromMillisecondsSinceEpoch(startTimeInMillis);
     notifyPropertyChange(#upTime, 0, 1);
-    var countersMap = map['tagCounters'];
+    var countersMap = map['_tagCounters'];
     if (countersMap != null) {
       var names = countersMap['names'];
       var counts = countersMap['counters'];
       assert(names.length == counts.length);
       var sum = 0;
       for (var i = 0; i < counts.length; i++) {
         sum += counts[i];
       }
       // TODO: Why does this not work without this?
       counters = toObservable({});
@@ skipping 14 matching lines @@
       });
     timers['total'] = timerMap['time_total_runtime'];
     timers['compile'] = timerMap['time_compilation'];
     timers['gc'] = 0.0;  // TODO(turnidge): Export this from VM.
     timers['init'] = (timerMap['time_script_loading'] +
                       timerMap['time_creating_snapshot'] +
                       timerMap['time_isolate_initialization'] +
                       timerMap['time_bootstrap']);
     timers['dart'] = timerMap['time_dart_execution'];
 
-    updateHeapsFromMap(map['heaps']);
+    updateHeapsFromMap(map['_heaps']);
     _updateBreakpoints(map['breakpoints']);
 
-    List features = map['features'];
-    if (features != null) {
-      for (var feature in features) {
-        if (feature == 'io') {
-          ioEnabled = true;
-        }
-      }
-    }
     pauseEvent = map['pauseEvent'];
     _updateRunState();
     error = map['error'];
 
     libraries.clear();
     libraries.addAll(map['libraries']);
     libraries.sort(ServiceObject.LexicalSortName);
   }
 
   Future<TagProfile> updateTagProfile() {
@@ skipping 2047 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }