Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/observatory_ui/mocks/objects/inbound_references.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 InboundReferencesMock implements M.InboundReferences {
   final Iterable<M.InboundReference> elements;
 
   const InboundReferencesMock({this.elements: const []});
 }
 
 class InboundReferenceMock implements M.InboundReference {
   final M.ObjectRef source;
   final M.ObjectRef parentField;
   final int parentListIndex;
   final int parentWordOffset;
 
-  const InboundReferenceMock(
-      {this.source: const InstanceRefMock(),
-      this.parentField,
-      this.parentListIndex,
-      this.parentWordOffset});
+  const InboundReferenceMock({this.source: const InstanceRefMock(),
+                              this.parentField, this.parentListIndex,
+                              this.parentWordOffset});
 }