Correct capacity reporting for new space; show external size in Observatory.

runtime/bin/vmservice/client/lib/src/elements/heap_profile.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.
 
 library heap_profile_element;
 
 import 'dart:html';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 import 'package:logging/logging.dart';
@@ skipping 115 matching lines @@
            _combinedTableColumnValue(cls, 2),
            _combinedTableColumnValue(cls, 3),
            _combinedTableColumnValue(cls, 4),
            _combinedTableColumnValue(cls, 5),
            _combinedTableColumnValue(cls, 6)]);
     }
     _newPieDataTable.clearRows();
     var heap = profile['heaps']['new'];
     _newPieDataTable.addRow(['Used', heap['used']]);
     _newPieDataTable.addRow(['Free', heap['capacity'] - heap['used']]);
+    _newPieDataTable.addRow(['External', heap['external']]);
     _oldPieDataTable.clearRows();
     heap = profile['heaps']['old'];
     _oldPieDataTable.addRow(['Used', heap['used']]);
     _oldPieDataTable.addRow(['Free', heap['capacity'] - heap['used']]);
+    _oldPieDataTable.addRow(['External', heap['external']]);
     _draw();
   }
 
   void _draw() {
     if ((_fullChart == null) || (_combinedChart == null)) {
       return;
     }
     _combinedChart.refreshOptionsSortInfo();
     _combinedChart.draw(_combinedDataTable);
     _fullChart.refreshOptionsSortInfo();
@@ skipping 126 matching lines @@
 
   @observable String formattedTotalCollectionTime(bool newSpace) {
     if (profile == null) {
       return '';
     }
     String space = newSpace ? 'new' : 'old';
     Map heap = profile['heaps'][space];
     return '${formatSeconds(heap['time'])} secs';
   }
 }