Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/observatory_ui/mocks/objects/field.dart

 // Copyright (c) 2016, 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 mocks;
 
 class FieldRefMock implements M.FieldRef {
   final String id;
   final String name;
   final M.ObjectRef dartOwner;
   final M.InstanceRef declaredType;
   final bool isConst;
   final bool isFinal;
   final bool isStatic;
 
-  const FieldRefMock(
-      {this.id: 'field-id',
-      this.name: 'field-name',
-      this.dartOwner,
-      this.declaredType: const InstanceRefMock(name: 'dynamic'),
-      this.isConst: false,
-      this.isFinal: false,
-      this.isStatic: false});
+  const FieldRefMock({this.id: 'field-id', this.name: 'field-name',
+                      this.dartOwner,
+                      this.declaredType: const InstanceRefMock(name: 'dynamic'),
+                      this.isConst: false,
+                      this.isFinal: false, this.isStatic: false});
 }