Deprecate PathService::Get(..., wstring*) and use FilePath instead.

base/path_service.h

 // Copyright (c) 2006-2008 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_PATH_SERVICE_H_
 #define BASE_PATH_SERVICE_H_
 
 #include "build/build_config.h"
 
 #include <string>
 
 #include "base/base_paths.h"
 
 class FilePath;
 
 // The path service is a global table mapping keys to file system paths.  It is
 // OK to use this service from multiple threads.
 //
 class PathService {
  public:
   // Retrieves a path to a special directory or file and places it into the
   // string pointed to by 'path'. If you ask for a directory it is guaranteed
   // to NOT have a path separator at the end. For example, "c:\windows\temp"
   // Directories are also guaranteed to exist when this function succeeds.
   //
   // Returns true if the directory or file was successfully retrieved. On
   // failure, 'path' will not be changed.
   static bool Get(int key, FilePath* path);
+#if defined(OS_WIN)
   // This version, producing a wstring, is deprecated and only kept around
   // until we can fix all callers.
   static bool Get(int key, std::wstring* path);
+#endif
 
   // Overrides the path to a special directory or file.  This cannot be used to
   // change the value of DIR_CURRENT, but that should be obvious.  Also, if the
   // path specifies a directory that does not exist, the directory will be
   // created by this method.  This method returns true if successful.
   //
   // If the given path is relative, then it will be resolved against
   // DIR_CURRENT.
   //
   // WARNING: Consumers of PathService::Get may expect paths to be constant
@@ skipping 17 matching lines @@
   // key_end)" of supported path keys.
   static void RegisterProvider(ProviderFunc provider,
                                int key_start,
                                int key_end);
  private:
   static bool GetFromCache(int key, FilePath* path);
   static void AddToCache(int key, const FilePath& path);
 };
 
 #endif  // BASE_PATH_SERVICE_H_