sync: Store hard coded constants into its header file.

chrome/browser/sync/tools/sync_listen_notifications.cc

Index: chrome/browser/sync/tools/sync_listen_notifications.cc
diff --git a/chrome/browser/sync/tools/sync_listen_notifications.cc b/chrome/browser/sync/tools/sync_listen_notifications.cc
index 899798ef66d0922d346b5a1fa05a185e69e95857..4adf374191579cf77d833e5240d01106ea8668c8 100644
--- a/chrome/browser/sync/tools/sync_listen_notifications.cc
+++ b/chrome/browser/sync/tools/sync_listen_notifications.cc
@@ -17,6 +17,7 @@
 #include "base/task.h"
 #include "chrome/browser/sync/notification_method.h"
 #include "chrome/browser/sync/sync_constants.h"
+#include "chrome/browser/sync/tools/sync_constants.h"
 #include "chrome/common/net/notifier/base/task_pump.h"
 #include "chrome/common/net/notifier/communicator/xmpp_socket_adapter.h"
 #include "chrome/common/net/notifier/listener/listen_task.h"
@@ -753,13 +754,11 @@ int main(int argc, char* argv[]) {
   MessageLoopForIO message_loop;
 
   // TODO(akalin): Make this configurable.
-  // TODO(akalin): Store these constants in a header somewhere (maybe
-  // browser/sync/protocol).
   std::vector<std::string> data_types;
-  data_types.push_back("AUTOFILL");
-  data_types.push_back("BOOKMARK");
-  data_types.push_back("THEME");
-  data_types.push_back("PREFERENCE");
+  data_types.push_back(sync_tools::kAutoFillType);
+  data_types.push_back(sync_tools::kBookmarkType);
+  data_types.push_back(sync_tools::kThemeType);
+  data_types.push_back(sync_tools::kPreferenceType);
 
   // Connect and listen.
   LegacyNotifierDelegate legacy_notifier_delegate;