Refactoring: Change all -FileUtils non-Singleton and to own underlying FileUtils.

chrome/browser/extensions/extension_file_browser_private_api.cc

 // Copyright (c) 2011 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/extension_file_browser_private_api.h"
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 677 matching lines @@
           false);     // create
     FilePath final_file_path = root_path.Append(virtual_path);
 
     fileapi::ExternalFileSystemMountPointProvider* external_provider =
         path_manager->external_provider();
     if (!external_provider)
       return false;
 
     // Check if this file system entry exists first.
     base::PlatformFileInfo file_info;
-    FilePath platform_path;
-    fileapi::FileSystemOperationContext file_system_operation_context(
-        profile_->GetFileSystemContext(),
-        external_provider->GetFileSystemFileUtil());
-    if (base::PLATFORM_FILE_OK !=
-            fileapi::FileSystemFileUtil::GetInstance()->GetFileInfo(
-                &file_system_operation_context, final_file_path, &file_info,
-                &platform_path)) {
+
+    if (!file_util::PathExists(final_file_path) ||
+        file_util::IsLink(final_file_path) ||
+        !file_util::GetFileInfo(final_file_path, &file_info))
       return false;
-    }
 
     // TODO(zelidrag): Let's just prevent all symlinks for now. We don't want a
     // USB drive content to point to something in the rest of the file system.
     // Ideally, we should permit symlinks within the boundary of the same
     // virtual mount point.
     if (file_info.is_symbolic_link)
       return false;
 
     // Get task details.
     std::string target_extension_id;
@@ skipping 708 matching lines @@
 #undef SET_STRING
 
   // TODO(serya): Create a new string in .grd file for this one in M13.
   dict->SetString("PREVIEW_IMAGE",
       l10n_util::GetStringUTF16(IDS_CERT_MANAGER_VIEW_CERT_BUTTON));
   dict->SetString("PLAY_MEDIA",
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_PLAY));
 
   return true;
 }