Add return values to SyncerCommand

chrome/browser/sync/engine/post_commit_message_command.h

Index: chrome/browser/sync/engine/post_commit_message_command.h
diff --git a/chrome/browser/sync/engine/post_commit_message_command.h b/chrome/browser/sync/engine/post_commit_message_command.h
index 6470bb69ac3b32d43aec2fd9fb8469da1d9c0d5b..5f2252c31ceb86d59aeec74d10e92c4fe48b17e9 100644
--- a/chrome/browser/sync/engine/post_commit_message_command.h
+++ b/chrome/browser/sync/engine/post_commit_message_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.
 
@@ -17,7 +17,7 @@ class PostCommitMessageCommand : public SyncerCommand {
   virtual ~PostCommitMessageCommand();
 
   // SyncerCommand implementation.
-  virtual void ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
+  virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PostCommitMessageCommand);