Fixed missing method referenced when MallocHooks is unsupported.

runtime/observatory/lib/src/elements/vm_view.dart

 // Copyright (c) 2013, 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 vm_view_element;
 
 import 'dart:async';
 import 'dart:html';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/helpers/nav_bar.dart';
@@ skipping 212 matching lines @@
                       new SpanElement()..text = 'see ',
                       new AnchorElement(href: Uris.flags())..text = 'flags'
                     ],
                   new DivElement()
                     ..classes = ['memberValue']
                     ..children = [
                       new SpanElement()..text = 'view ',
                       new AnchorElement(href: Uris.timeline())
                         ..text = 'timeline'
                     ]
+                ],
+              new DivElement()
+                ..classes = ['memberItem']
+                ..children = [
+                  new DivElement()
+                    ..classes = ['memberName']
+                    ..children = [
+                      new SpanElement()..text = 'view ',
+                      new AnchorElement(href: Uris.nativeMemory())
+                        ..text = 'native memory profile'
+                    ]
                 ]
             ],
           new BRElement(),
           new HeadingElement.h1()..text = 'Isolates (${isolates.length})',
           new HRElement(),
           new UListElement()
             ..classes = ['list-group']
             ..children = isolates
                 .expand((i) => [
                       new LIElement()
                         ..classes = ['list-group-item']
                         ..children = [
                           new IsolateSummaryElement(
                               i, _isolates, _events, _scripts,
                               queue: _r.queue)
                         ],
                       new HRElement()
                     ])
                 .toList(),
           new ViewFooterElement(queue: _r.queue)
         ]
     ];
   }
 }