Add return values to SyncerCommand

chrome/browser/sync/engine/model_changing_syncer_command_unittest.cc

Index: chrome/browser/sync/engine/model_changing_syncer_command_unittest.cc
diff --git a/chrome/browser/sync/engine/model_changing_syncer_command_unittest.cc b/chrome/browser/sync/engine/model_changing_syncer_command_unittest.cc
index 93736de6a4ef69cf210fbc1eb7463f3b8b683ced..1e9d1d13e8d895811b8e6364f462c751a29f36f1 100644
--- a/chrome/browser/sync/engine/model_changing_syncer_command_unittest.cc
+++ b/chrome/browser/sync/engine/model_changing_syncer_command_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -31,9 +31,10 @@ class FakeModelChangingSyncerCommand : public ModelChangingSyncerCommand {
     return session.GetEnabledGroups();
   }
 
-  virtual void ModelChangingExecuteImpl(
+  virtual SyncerError ModelChangingExecuteImpl(
       sessions::SyncSession* session) OVERRIDE {
     changed_groups_.insert(session->status_controller().group_restriction());
+    return SYNCER_OK;
   }
 
  private: