Remember when an isolate was paused and subtly display it in Obseravatory

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;
 
 /// Helper function for canceling a Future<StreamSubscription>.
 Future cancelFutureSubscription(
     Future<StreamSubscription> subscriptionFuture) async {
   if (subscriptionFuture != null) {
@@ skipping 749 matching lines @@
       return;
     }
     // Note that upgrading the collection creates any isolates in the
     // isolate list which are new.
     _upgradeCollection(map, vm);
 
     _loaded = true;
     version = map['version'];
     targetCPU = map['targetCPU'];
     architectureBits = map['architectureBits'];
-    var startTimeMillis = map['startTime'];
+    var startTimeMillis = map['startTime'].toInt();
     startTime = new DateTime.fromMillisecondsSinceEpoch(startTimeMillis);
     refreshTime = new DateTime.now();
     notifyPropertyChange(#upTime, 0, 1);
     pid = map['pid'];
     assertsEnabled = map['_assertsEnabled'];
     typeChecksEnabled = map['_typeChecksEnabled'];
     _removeDeadIsolates(map['isolates']);
   }
 
   // Reload all isolates.
@@ skipping 450 matching lines @@
     }
     _loaded = true;
     loading = false;
 
     _upgradeCollection(map, isolate);
     rootLibrary = map['rootLib'];
     if (map['entry'] != null) {
       entry = map['entry'];
     }
     var savedStartTime = startTime;
-    var startTimeInMillis = map['startTime'];
+    var startTimeInMillis = map['startTime'].toInt();
     startTime = new DateTime.fromMillisecondsSinceEpoch(startTimeInMillis);
     notifyPropertyChange(#upTime, 0, 1);
     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];
@@ skipping 474 matching lines @@
   static const kConnectionClosed       = 'ConnectionClosed';
   static const kLogging                = '_Logging';
 
   ServiceEvent._empty(ServiceObjectOwner owner) : super._empty(owner);
 
   ServiceEvent.connectionClosed(this.reason) : super._empty(null) {
     kind = kConnectionClosed;
   }
 
   @observable String kind;
+  @observable DateTime timestamp;
   @observable Breakpoint breakpoint;
   @observable Frame topFrame;
   @observable Instance exception;
   @observable Instance asyncContinuation;
   @observable bool atAsyncJump;
   @observable ServiceObject inspectee;
   @observable ByteData data;
   @observable int count;
   @observable String reason;
   @observable String exceptions;
   @observable String bytesAsString;
   @observable Map logRecord;
+
   int chunkIndex, chunkCount, nodeCount;
 
   @observable bool get isPauseEvent {
     return (kind == kPauseStart ||
             kind == kPauseExit ||
             kind == kPauseBreakpoint ||
             kind == kPauseInterrupted ||
             kind == kPauseException);
   }
 
   void _update(ObservableMap map, bool mapIsRef) {
     _loaded = true;
     _upgradeCollection(map, owner);
     assert(map['isolate'] == null || owner == map['isolate']);
+    timestamp =
+        new DateTime.fromMillisecondsSinceEpoch(map['timestamp'].toInt());
     kind = map['kind'];
     notifyPropertyChange(#isPauseEvent, 0, 1);
     name = 'ServiceEvent $kind';
     vmName = name;
     if (map['breakpoint'] != null) {
       breakpoint = map['breakpoint'];
     }
     // TODO(turnidge): Expose the full list of breakpoints.  For now
     // we just pretend like there is only one active breakpoint.
     if (map['pauseBreakpoints'] != null) {
@@ skipping 2024 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);
     }
   }
 }