[FileAPI] Replace default leveldb::Env with leveldb::MemEnv in tests.

content/public/test/test_file_system_options.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 "content/public/test/test_file_system_options.h"
 
 #include <string>
 #include <vector>
 
 using fileapi::FileSystemOptions;
 
 namespace content {
 
 FileSystemOptions CreateIncognitoFileSystemOptions() {
   std::vector<std::string> additional_allowed_schemes;
 #if defined(OS_CHROMEOS)
   additional_allowed_schemes.push_back("chrome-extension");
 #endif
   return FileSystemOptions(FileSystemOptions::PROFILE_MODE_INCOGNITO,
-                           additional_allowed_schemes);
-};
+                           additional_allowed_schemes,
+                           NULL);
+}
 
 FileSystemOptions CreateAllowFileAccessOptions() {
   std::vector<std::string> additional_allowed_schemes;
   additional_allowed_schemes.push_back("file");
 #if defined(OS_CHROMEOS)
   additional_allowed_schemes.push_back("chrome-extension");
 #endif
   return FileSystemOptions(FileSystemOptions::PROFILE_MODE_NORMAL,
-                           additional_allowed_schemes);
-};
+                           additional_allowed_schemes,
+                           NULL);
+}
 
 FileSystemOptions CreateDisallowFileAccessOptions() {
   std::vector<std::string> additional_allowed_schemes;
 #if defined(OS_CHROMEOS)
   additional_allowed_schemes.push_back("chrome-extension");
 #endif
   return FileSystemOptions(FileSystemOptions::PROFILE_MODE_NORMAL,
-                           additional_allowed_schemes);
-};
+                           additional_allowed_schemes,
+                           NULL);
+}
 
 }  // namespace content