Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/observatory_ui/mocks/objects/vm.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 VMRefMock implements M.VMRef {
   final String name;
   final String displayName;
   const VMRefMock({this.name: 'vm-name', this.displayName: 'vm-display-name'});
 }
 
 class VMMock implements M.VM {
   final String name;
   final String displayName;
   final int architectureBits;
   final String targetCPU;
   final String hostCPU;
   final String version;
   final int pid;
   final int maxRSS;
   final DateTime startTime;
   final Iterable<M.IsolateRef> isolates;
 
-  const VMMock(
-      {this.name: 'vm-name',
-      this.displayName: 'vm-display-name',
-      this.architectureBits,
-      this.targetCPU,
-      this.hostCPU,
-      this.version,
-      this.pid: 0,
-      this.maxRSS: 0,
-      this.startTime,
-      this.isolates: const []});
+  const VMMock({this.name: 'vm-name', this.displayName: 'vm-display-name',
+      this.architectureBits, this.targetCPU, this.hostCPU, this.version,
+      this.pid: 0, this.maxRSS: 0, this.startTime, this.isolates : const []});
 }