Fixed missing method referenced when MallocHooks is unsupported.

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

Index: runtime/observatory/lib/src/elements/vm_view.dart
diff --git a/runtime/observatory/lib/src/elements/vm_view.dart b/runtime/observatory/lib/src/elements/vm_view.dart
index e87fddc746106dc38a1d640e859f6b01ec6fc3da..fd37dd2164666c8c21efa2ea7f00ccd69b4174fd 100644
--- a/runtime/observatory/lib/src/elements/vm_view.dart
+++ b/runtime/observatory/lib/src/elements/vm_view.dart
@@ -230,6 +230,17 @@ class VMViewElement extends HtmlElement implements Renderable {
                       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(),