Add return values to SyncerCommand

chrome/browser/sync/engine/cleanup_disabled_types_command.h

Index: chrome/browser/sync/engine/cleanup_disabled_types_command.h
diff --git a/chrome/browser/sync/engine/cleanup_disabled_types_command.h b/chrome/browser/sync/engine/cleanup_disabled_types_command.h
index f5d2f40cf8135b204cb0516c8ed8b0cdec066825..70dece22ae48782d50c36210c0c217b1886bb99d 100644
--- a/chrome/browser/sync/engine/cleanup_disabled_types_command.h
+++ b/chrome/browser/sync/engine/cleanup_disabled_types_command.h
@@ -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.
 
@@ -34,7 +34,7 @@ class CleanupDisabledTypesCommand : public SyncerCommand {
   virtual ~CleanupDisabledTypesCommand();
 
   // SyncerCommand implementation.
-  virtual void ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
+  virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CleanupDisabledTypesCommand);