Prettify output from chrome.fileSystem.getDisplayPath for POSIX profile directories

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 "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 30 matching lines @@
 namespace {
 
 struct RewritePair {
   int path_key;
   const char* output;
 };
 
 const RewritePair g_rewrite_pairs[] = {
 #if defined(OS_WIN)
   {base::DIR_PROFILE, "~"},
+#elif defined(OS_POSIX)
+  {base::DIR_HOME, "~"},
 #endif
 };
 
 FilePath PrettifyPath(const FilePath& file_path) {
-  // Note that when g_rewrite_pairs includes at least one value on all
-  // platforms, this code can be cleaned up.
-#if defined(OS_WIN)
-  size_t size = arraysize(g_rewrite_pairs);
-#else
-  size_t size = 0;
-#endif
-
-  for (size_t i = 0; i < size; ++i) {
+#if defined(OS_WIN) || defined(OS_POSIX)
+  for (size_t i = 0; i < arraysize(g_rewrite_pairs); ++i) {
     FilePath candidate_path;
     if (!PathService::Get(g_rewrite_pairs[i].path_key, &candidate_path))
       continue;  // We don't DCHECK this value, as Get will return false even
                  // if the path_key gives a blank string as a result.
 
     FilePath output = FilePath::FromUTF8Unsafe(g_rewrite_pairs[i].output);
     if (candidate_path.AppendRelativePath(file_path, &output)) {
       // The output path must not be absolute, as it might collide with the
       // real filesystem.
       DCHECK(!output.IsAbsolute());
       return output;
     }
   }
+#endif
 
   return file_path;
 }
 
 bool g_skip_picker_for_test = false;
 FilePath* g_path_to_be_picked_for_test;
 
 bool GetFilePathOfFileEntry(const std::string& filesystem_name,
                             const std::string& filesystem_path,
                             const content::RenderViewHost* render_view_host,
@@ skipping 302 matching lines @@
 
   if (entry_type == WRITABLE && !HasFileSystemWritePermission()) {
     error_ = kRequiresFileSystemWriteError;
     return false;
   }
 
   return ShowPicker(FilePath(), picker_type, entry_type);
 }
 
 }  // namespace extensions