Cleanup: Consolidate declarations of XDG variables.

base/nix/xdg_util.h

 // 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.
 
 #ifndef BASE_NIX_XDG_UTIL_H_
 #define BASE_NIX_XDG_UTIL_H_
 #pragma once
 
 // XDG refers to http://en.wikipedia.org/wiki/Freedesktop.org .
 // This file contains utilities found across free desktop environments.
 //
 // TODO(brettw) this file should be in app/x11, but is currently used by
 // net. We should have a net API to allow the embedder to specify the behavior
 // that it uses XDG for, and then move this file.
 
 #include "base/base_export.h"
 
 #ifdef nix
 #error asdf
 #endif
 
 class FilePath;
 
 namespace base {
 
 class Environment;
 
 namespace nix {
 
+// The default XDG config directory name.
+BASE_EXPORT extern const char kDotConfigDir[];
+
+// The XDG config directory environment variable.
+BASE_EXPORT extern const char kXdgConfigHomeEnvVar[];
+
 // Utility function for getting XDG directories.
 // |env_name| is the name of an environment variable that we want to use to get
 // a directory path. |fallback_dir| is the directory relative to $HOME that we
 // use if |env_name| cannot be found or is empty. |fallback_dir| may be NULL.
 // Examples of |env_name| are XDG_CONFIG_HOME and XDG_DATA_HOME.
 BASE_EXPORT FilePath GetXDGDirectory(Environment* env, const char* env_name,
                                      const char* fallback_dir);
 
 // Wrapper around xdg_user_dir_lookup() from src/base/third_party/xdg-user-dirs
 // This looks up "well known" user directories like the desktop and music
@@ skipping 20 matching lines @@
 // Return a string representation of the given desktop environment.
 // May return NULL in the case of DESKTOP_ENVIRONMENT_OTHER.
 BASE_EXPORT const char* GetDesktopEnvironmentName(DesktopEnvironment env);
 // Convenience wrapper that calls GetDesktopEnvironment() first.
 BASE_EXPORT const char* GetDesktopEnvironmentName(Environment* env);
 
 }  // namespace nix
 }  // namespace base
 
 #endif  // BASE_NIX_XDG_UTIL_H_