Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/observatory_ui/mocks/objects/pc_descriptors.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 PcDescriptorsRefMock implements M.PcDescriptorsRef {
   final String id;
   final String name;
 
-  const PcDescriptorsRefMock(
-      {this.id: 'pcdescriptors-id', this.name: 'pcdescriptors-name'});
+  const PcDescriptorsRefMock({this.id: 'pcdescriptors-id',
+                              this.name: 'pcdescriptors-name'});
 }