Format all remaining unformatted runtime files other than multitests.

runtime/observatory/lib/src/elements/stack_trace_tree_config.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 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 
@@ skipping 162 matching lines @@
   }
 
   List<Element> _createModeSelect() {
     var s;
     return [
       s = new SelectElement()
         ..classes = ['mode-select']
         ..value = modeToString(_mode)
         ..children = ProfileTreeMode.values.map((mode) {
           return new OptionElement(
-              value: modeToString(mode),
-              selected: _mode == mode)..text = modeToString(mode);
+              value: modeToString(mode), selected: _mode == mode)
+            ..text = modeToString(mode);
         }).toList(growable: false)
         ..onChange.listen((_) {
           _mode = ProfileTreeMode.values[s.selectedIndex];
           _r.dirty();
         })
         ..onChange.map(_toEvent).listen(_triggerModeChange),
       new SpanElement()..text = ' $modeDescription'
     ];
   }
 
@@ skipping 60 matching lines @@
   }
 
   StackTraceTreeConfigChangedEvent _toEvent(_) {
     return new StackTraceTreeConfigChangedEvent(this);
   }
 
   void _triggerModeChange(e) => _onModeChange.add(e);
   void _triggerDirectionChange(e) => _onDirectionChange.add(e);
   void _triggerFilterChange(e) => _onFilterChange.add(e);
 }