Build sync engine as part of the browser build

chrome/browser/sync/util/user_settings.h

 // Copyright (c) 2006-2008 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_UTIL_USER_SETTINGS_H_
 #define CHROME_BROWSER_SYNC_UTIL_USER_SETTINGS_H_
 
 #include <map>
 #include <set>
 #include <string>
 
+#include "build/build_config.h"
 #include "chrome/browser/sync/util/pthread_helpers.h"
 #include "chrome/browser/sync/util/signin.h"
 #include "chrome/browser/sync/util/sync_types.h"
 
 extern "C" struct sqlite3;
 
 namespace browser_sync {
 
 class URLFactory;
 
@@ skipping 71 matching lines @@
   mutable PThreadMutex mutex_;  // protects email_
   typedef PThreadScopedLock<PThreadMutex> ScopedLock;
 
   // We keep a single dbhandle.
   sqlite3* dbhandle_;
   PThreadMutex dbhandle_mutex_;
 
   // TODO(sync): Use in-memory cache for service auth tokens on posix.
   // Have someone competent in Windows switch it over to not use Sqlite in the
   // future.
-#ifndef OS_WINDOWS
+#ifndef OS_WIN
   typedef std::map<std::string, std::string> ServiceTokenMap;
   ServiceTokenMap service_tokens_;
-#endif  // OS_WINDOWS
+#endif  // OS_WIN
 
   DISALLOW_COPY_AND_ASSIGN(UserSettings);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_UTIL_USER_SETTINGS_H_