Clean up remaining unused globals (on mac).

sync/tools/sync_listen_notifications.cc

 // 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.
 
 #include <cstddef>
 #include <cstdio>
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
@@ skipping 27 matching lines @@
 // listens to any received notifications.
 
 namespace syncer {
 namespace {
 
 const char kEmailSwitch[] = "email";
 const char kTokenSwitch[] = "token";
 const char kHostPortSwitch[] = "host-port";
 const char kTrySslTcpFirstSwitch[] = "try-ssltcp-first";
 const char kAllowInsecureConnectionSwitch[] = "allow-insecure-connection";
-const char kNotificationMethodSwitch[] = "notification-method";
 
 // Class to print received notifications events.
 class NotificationPrinter : public InvalidationHandler {
  public:
   NotificationPrinter() {}
   virtual ~NotificationPrinter() {}
 
   virtual void OnInvalidatorStateChange(InvalidatorState state) OVERRIDE {
     LOG(INFO) << "Invalidator state changed to "
               << InvalidatorStateToString(state);
@@ skipping 147 matching lines @@
   io_thread.Stop();
   return 0;
 }
 
 }  // namespace
 }  // namespace syncer
 
 int main(int argc, char* argv[]) {
   return syncer::SyncListenNotificationsMain(argc, argv);
 }