Add support for GetHomeDir for Mac and Windows.

base/base_paths_posix.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.
 
 // Defines base::PathProviderPosix, default path provider on POSIX OSes that
 // don't have their own base_paths_OS.cc implementation (i.e. all but Mac and
 // Android).
 
 #include <ostream>
 #include <string>
@@ skipping 91 matching lines @@
     case base::DIR_USER_DESKTOP:
       *result = base::nix::GetXDGUserDirectory("DESKTOP", "Desktop");
       return true;
     case base::DIR_CACHE: {
       scoped_ptr<base::Environment> env(base::Environment::Create());
       FilePath cache_dir(base::nix::GetXDGDirectory(env.get(), "XDG_CACHE_HOME",
                                                     ".cache"));
       *result = cache_dir;
       return true;
     }
-    case base::DIR_HOME:
-      *result = GetHomeDir();
-      return true;
   }
   return false;
 }
 
 }  // namespace base