Clean up remaining unused globals (on mac).

remoting/host/config_file_watcher.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 "remoting/host/config_file_watcher.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/files/file_path_watcher.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/timer/timer.h"
 
 namespace remoting {
 
 // The name of the command-line switch used to specify the host configuration
 // file to use.
 const char kHostConfigSwitchName[] = "host-config";
 
 const base::FilePath::CharType kDefaultHostConfigFile[] =
     FILE_PATH_LITERAL("host.json");
 
+#if defined(OS_WIN)
 // Maximum number of times to try reading the configuration file before
 // reporting an error.
 const int kMaxRetries = 3;
+#endif  // defined(OS_WIN)
 
 class ConfigFileWatcherImpl
     : public base::RefCountedThreadSafe<ConfigFileWatcherImpl> {
  public:
   // Creates a configuration file watcher that lives on the |io_task_runner|
   // thread but posts config file updates on on |main_task_runner|.
   ConfigFileWatcherImpl(
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
       ConfigFileWatcher::Delegate* delegate);
@@ skipping 167 matching lines @@
   if (config_ != config) {
     config_ = config;
     main_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&ConfigFileWatcher::Delegate::OnConfigUpdated, delegate_,
                    config_));
   }
 }
 
 }  // namespace remoting