Removed const from classes arrays in Observatory

runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.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.
 
 import 'dart:async';
 import 'dart:html';
 import 'dart:math' as Math;
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/stack_trace_tree_config.dart'
   show ProfileTreeMode;
@@ skipping 99 matching lines @@
     _tree = new VirtualTreeElement(_createRow, update, _getChildren,
       items: tree.root.children, queue: _r.queue);
     if (tree.root.children.length == 1) {
       _tree.expand(tree.root.children.first, autoExpandSingleChildNodes: true);
     }
     children = [_tree];
   }
 
   static Element _createRow(toggle) {
     return new DivElement()
-      ..classes = const ['tree-item']
+      ..classes = ['tree-item']
       ..children = [
-        new SpanElement()..classes = const ['inclusive']
+        new SpanElement()..classes = ['inclusive']
           ..title = 'global % on stack',
-        new SpanElement()..classes = const ['exclusive']
+        new SpanElement()..classes = ['exclusive']
           ..title = 'global % executing',
-        new SpanElement()..classes = const ['lines'],
-        new ButtonElement()..classes = const ['expander']
+        new SpanElement()..classes = ['lines'],
+        new ButtonElement()..classes = ['expander']
           ..onClick.listen((_) => toggle(autoToggleSingleChildNodes: true)),
-        new SpanElement()..classes = const ['percentage']
+        new SpanElement()..classes = ['percentage']
           ..title = 'tree node %',
-        new SpanElement()..classes = const ['name']
+        new SpanElement()..classes = ['name']
       ];
   }
 
   static _getChildren(M.CallTreeNode node) => node.children;
 
   void _updateFunctionRow(HtmlElement element, M.FunctionCallTreeNode item,
       int depth) {
     element.children[0].text = Utils.formatPercentNormalized(
         item.profileFunction.normalizedInclusiveTicks);
     element.children[1].text = Utils.formatPercentNormalized(
         item.profileFunction.normalizedExclusiveTicks);
     _updateLines(element.children[2].children, depth);
     if (item.children.isNotEmpty) {
       element.children[3].text = _tree.isExpanded(item) ? '▼' : '►';
     } else {
       element.children[3].text = '';
     }
     element.children[4].text = Utils.formatPercentNormalized(
         item.percentage);
     element.children[5] = new FunctionRefElement(_isolate,
             item.profileFunction.function, queue: _r.queue)
-            ..classes = const ['name'];
+            ..classes = ['name'];
   }
 
   void _updateCodeRow(HtmlElement element, M.CodeCallTreeNode item, int depth) {
     element.children[0].text = Utils.formatPercentNormalized(
         item.profileCode.normalizedInclusiveTicks);
     element.children[1].text = Utils.formatPercentNormalized(
         item.profileCode.normalizedExclusiveTicks);
     _updateLines(element.children[2].children, depth);
     if (item.children.isNotEmpty) {
       element.children[3].text = _tree.isExpanded(item) ? '▼' : '►';
     } else {
       element.children[3].text = '';
     }
     element.children[4].text = Utils.formatPercentNormalized(
         item.percentage);
     element.children[5] = new CodeRefElement(_isolate,
         item.profileCode.code, queue: _r.queue)
-        ..classes = const ['name'];
+        ..classes = ['name'];
   }
 
   static _updateLines(List<Element> lines, int n) {
     n = Math.max(0, n);
     while (lines.length > n) {
       lines.removeLast();
     }
     while (lines.length < n) {
       lines.add(new SpanElement());
     }
   }
 }