Add support for GetHomeDir for Mac and Windows.

base/base_paths_mac.mm

 // 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::PathProviderMac which replaces base::PathProviderPosix for Mac
 // in base/path_service.cc.
 
 #include <dlfcn.h>
 #import <Foundation/Foundation.h>
 #include <mach-o/dyld.h>
@@ skipping 88 matching lines @@
     case base::DIR_USER_DESKTOP:
 #if defined(OS_IOS)
       // iOS does not have desktop directories.
       NOTIMPLEMENTED();
       return false;
 #else
       return base::mac::GetUserDirectory(NSDesktopDirectory, result);
 #endif
     case base::DIR_CACHE:
       return base::mac::GetUserDirectory(NSCachesDirectory, result);
-    case base::DIR_HOME:
-      *result = base::mac::NSStringToFilePath(NSHomeDirectory());
-      return true;
     default:
       return false;
   }
 }
 
 }  // namespace base