Add accumulator to allocation profiler

runtime/bin/vmservice/client/lib/src/observatory/chart.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 observatory;
 
 class GoogleChart {
   static var _api;
 
   /// Get access to the JsObject containing the Google Chart API:
@@ skipping 75 matching lines @@
   /// chart is rendered inside [element].
   Chart(String chartType, Element element) {
     _chart = new JsObject(GoogleChart.api[chartType], [element]);
   }
 
   /// When the user interacts with the table by clicking on columns,
   /// you must call this function before [draw] so that we draw
   /// with the current sort settings.
   void refreshOptionsSortInfo() {
     var props = _chart.callMethod('getSortInfo');
-    print(options);
-    if (props != null) {
+    if ((props != null) && (props['column'] != -1)) {
+      // Preserve current sort settings.
       options['sortColumn'] = props['column'];
       options['sortAscending'] = props['ascending'];
     }
-    print(options);
   }
 
   /// Draw this chart using [table] and the current [options].
   void draw(DataTable table) {
     var jsOptions = new JsObject.jsify(options);
     _chart.callMethod('draw', [table._table, jsOptions]);
   }
 }