Add support for GetHomeDir for Mac and Windows.

chrome/browser/extensions/api/file_system/file_system_api.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.
 
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
 
 #include "apps/app_window.h"
 #include "apps/app_window_registry.h"
 #include "apps/saved_files_service.h"
 #include "base/bind.h"
@@ skipping 110 matching lines @@
     std::string display = GetDisplayBaseName(actual_path);
     display_path = display_path.Append(display);
   }
   DCHECK_EQ(actual_path.value(), source_path.value());
   return display_path;
 }
 #else  // defined(OS_MACOSX)
 // Prettifies |source_path|, by replacing the user's home directory with "~"
 // (if applicable).
 base::FilePath PrettifyPath(const base::FilePath& source_path) {
-#if defined(OS_WIN) || defined(OS_POSIX)
-#if defined(OS_WIN)
-  int home_key = base::DIR_PROFILE;
-#elif defined(OS_POSIX)
-  int home_key = base::DIR_HOME;
-#endif
   base::FilePath home_path;
   base::FilePath display_path = base::FilePath::FromUTF8Unsafe("~");
-  if (PathService::Get(home_key, &home_path)
+  if (PathService::Get(base::DIR_HOME, &home_path)
       && home_path.AppendRelativePath(source_path, &display_path))
     return display_path;
-#endif
   return source_path;
 }
 #endif  // defined(OS_MACOSX)
 
 bool g_skip_picker_for_test = false;
 bool g_use_suggested_path_for_test = false;
 base::FilePath* g_path_to_be_picked_for_test;
 std::vector<base::FilePath>* g_paths_to_be_picked_for_test;
 bool g_skip_directory_confirmation_for_test = false;
 bool g_allow_directory_access_for_test = false;
@@ skipping 59 matching lines @@
     *description = l10n_util::GetStringUTF16(description_id);
 
   return true;
 }
 
 // Key for the path of the directory of the file last chosen by the user in
 // response to a chrome.fileSystem.chooseEntry() call.
 const char kLastChooseEntryDirectory[] = "last_choose_file_directory";
 
 const int kGraylistedPaths[] = {
+  base::DIR_HOME,
 #if defined(OS_WIN)
-  base::DIR_PROFILE,
   base::DIR_PROGRAM_FILES,
   base::DIR_PROGRAM_FILESX86,
   base::DIR_WINDOWS,
-#elif defined(OS_POSIX)
-  base::DIR_HOME,
 #endif
 };
 
 }  // namespace
 
 namespace extensions {
 
 namespace file_system_api {
 
 base::FilePath GetLastChooseEntryDirectory(const ExtensionPrefs* prefs,
@@ skipping 737 matching lines @@
   if (needs_new_entry) {
     is_directory_ = file_entry->is_directory;
     CreateResponse();
     AddEntryToResponse(file_entry->path, file_entry->id);
   }
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions