Adds ChromecastConfig to manage cast_shell's PrefService.

chromecast/common/cast_paths.h

 // Copyright 2014 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 CHROMECAST_COMMON_CAST_PATHS_H_
 #define CHROMECAST_COMMON_CAST_PATHS_H_
 
 // This file declares path keys for the chromecast module.  These can be used
 // with the PathService to access various special directories and files.
 
 namespace chromecast {
 
 enum {
   PATH_START = 8000,
 
   DIR_CAST_HOME,    // Return a modified $HOME which works for both
                     // development use and the actual device.
 
+  PATH_CAST_CONFIG, // Config/preferences file path, defaults to
+                    // "$HOME/.eureka.conf".
   PATH_END
 };
 
 // Call once to register the provider for the path keys defined above.
 void RegisterPathProvider();
 
 }  // namespace chromecast
 
 #endif  // CHROMECAST_COMMON_CAST_PATHS_H_