Send important client side event information to the server.

chrome/browser/sync/engine/download_updates_command.h

 // Copyright (c) 2006-2009 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.
 
 #ifndef CHROME_BROWSER_SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_
 #define CHROME_BROWSER_SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "base/gtest_prod_util.h"
 #include "chrome/browser/sync/engine/model_safe_worker.h"
 #include "chrome/browser/sync/engine/syncer_command.h"
+#include "chrome/browser/sync/protocol/sync.pb.h"
 #include "chrome/browser/sync/syncable/model_type.h"
 
 namespace sync_pb {
 class EntitySpecifics;
 }
 
 namespace browser_sync {
 
 // Determine the enabled datatypes, download a batch of updates for them
 // from the server, place the result in the SyncSession for further processing.
@@ skipping 18 matching lines @@
   DownloadUpdatesCommand();
   virtual ~DownloadUpdatesCommand();
 
   // SyncerCommand implementation.
   virtual void ExecuteImpl(sessions::SyncSession* session);
 
   void SetRequestedTypes(const syncable::ModelTypeBitSet& target_datatypes,
                          sync_pb::EntitySpecifics* filter_protobuf);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(DownloadUpdatesCommandTest, VerifyAppendDebugInfo);
+  void AppendClientDebugInfoIfNeeded(sessions::SyncSession* session,
+      sync_pb::DebugInfo* debug_info);
   DISALLOW_COPY_AND_ASSIGN(DownloadUpdatesCommand);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_