FileSystem: Modify ObfucatedFileUtil to delete contents of the plugin private filesystem

storage/browser/fileapi/plugin_private_file_system_backend.cc

 // Copyright 2013 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 "storage/browser/fileapi/plugin_private_file_system_backend.h"
 
 #include <map>
 
 #include "base/stl_util.h"
 #include "base/synchronization/lock.h"
@@ skipping 205 matching lines @@
 }
 
 base::File::Error
 PluginPrivateFileSystemBackend::DeleteOriginDataOnFileTaskRunner(
     FileSystemContext* context,
     storage::QuotaManagerProxy* proxy,
     const GURL& origin_url,
     FileSystemType type) {
   if (!CanHandleType(type))
     return base::File::FILE_ERROR_SECURITY;
-  bool result = obfuscated_file_util()->DeleteDirectoryForOriginAndType(
-      origin_url, std::string());
+  bool result = obfuscated_file_util()->
+      DeleteOriginDirectoryForPluginPrivateFileSystem(origin_url);
   if (result)
     return base::File::FILE_OK;
   return base::File::FILE_ERROR_FAILED;
 }
 
 void PluginPrivateFileSystemBackend::GetOriginsForTypeOnFileTaskRunner(
     FileSystemType type,
     std::set<GURL>* origins) {
   if (!CanHandleType(type))
     return;
@@ skipping 50 matching lines @@
     FileSystemType type) const {
   return NULL;
 }
 
 ObfuscatedFileUtil* PluginPrivateFileSystemBackend::obfuscated_file_util() {
   return static_cast<ObfuscatedFileUtil*>(
       static_cast<AsyncFileUtilAdapter*>(file_util_.get())->sync_file_util());
 }
 
 }  // namespace storage