Revert "Added isolate + thread high watermark tracking to Observatory"

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;
 
 // Some value smaller than the object ring, so requesting a large array
 // doesn't result in an expired ref because the elements lapped it in the
 // object ring.
 const int kDefaultFieldLimit = 100;
@@ skipping 1489 matching lines @@
   String fileAndLine;
 
   DartError error;
   StreamController _snapshotFetch;
 
   List<ByteData> _chunksInProgress;
 
   List<Thread> get threads => _threads;
   final List<Thread> _threads = new List<Thread>();
 
-  int get memoryHighWatermark => _memoryHighWatermark;
-  int _memoryHighWatermark;
-
   void _loadHeapSnapshot(ServiceEvent event) {
     if (_snapshotFetch == null || _snapshotFetch.isClosed) {
       // No outstanding snapshot request. Presumably another client asked for a
       // snapshot.
       Logger.root.info("Dropping unsolicited heap snapshot chunk");
       return;
     }
 
     // Occasionally these actually arrive out of order.
     var chunkIndex = event.chunkIndex;
@@ skipping 108 matching lines @@
 
     extensionRPCs.clear();
     if (map['extensionRPCs'] != null) {
       extensionRPCs.addAll(map['extensionRPCs']);
     }
 
     threads.clear();
     if(map['threads'] != null) {
       threads.addAll(map['threads']);
     }
-
-    _memoryHighWatermark = map['isolateMemoryHighWatermark'];
   }
 
   Future<TagProfile> updateTagProfile() {
     return isolate.invokeRpcNoUpgrade('_getTagProfile', {}).then((Map map) {
       var seconds = new DateTime.now().millisecondsSinceEpoch / 1000.0;
       tagProfile._processTagProfile(seconds, map);
       return tagProfile;
     });
   }
 
@@ skipping 1417 matching lines @@
 
   String toString() => 'Sentinel($kind)';
   String get shortName => valueAsString;
 }
 
 class Thread extends ServiceObject implements M.Thread {
   M.ThreadKind get kind => _kind;
   M.ThreadKind _kind;
   String get kindString => _kindString;
   String _kindString;
-  int get memoryHighWatermark => _memoryHighWatermark;
-  int _memoryHighWatermark;
   List<Zone> get zones => _zones;
   final List<Zone> _zones = new List<Zone>();
 
   Thread._empty(ServiceObjectOwner owner) : super._empty(owner);
 
   void _update(Map map, bool mapIsRef) {
     String rawKind = map['kind'];
     List<Map> zoneList = map['zones'];
 
     switch(rawKind) {
@@ skipping 17 matching lines @@
         _kind = M.ThreadKind.markerTask;
         _kindString = 'marker';
         break;
       case "kFinalizerTask":
         _kind = M.ThreadKind.finalizerTask;
         _kindString = 'finalizer';
         break;
       default:
         assert(false);
     }
-
-    _memoryHighWatermark = map['threadMemoryHighWatermark'];
-
     zones.clear();
     zoneList.forEach((zone) {
       int capacity = zone['capacity'];
       int used = zone['used'];
       zones.add(new Zone(capacity, used));
     });
   }
 }
 
 class Zone implements M.Zone {
@@ skipping 1369 matching lines @@
     var v = list[i];
     if ((v is Map) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is List) {
       _upgradeList(v, owner);
     } else if (v is Map) {
       _upgradeMap(v, owner);
     }
   }
 }