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

content/browser/fileapi/obfuscated_file_util_unittest.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 <set>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 218 matching lines @@
         new SandboxFileSystemTestHelper(origin, type);
 
     file_system->SetUp(file_system_context_.get());
     return file_system;
   }
 
   scoped_ptr<ObfuscatedFileUtil> CreateObfuscatedFileUtil(
       quota::SpecialStoragePolicy* storage_policy) {
     return scoped_ptr<ObfuscatedFileUtil>(
       ObfuscatedFileUtil::CreateForTesting(
-          storage_policy, data_dir_path(),
+          storage_policy, data_dir_path(), NULL,
           base::MessageLoopProxy::current().get()));
   }
 
   ObfuscatedFileUtil* ofu() {
     return static_cast<ObfuscatedFileUtil*>(sandbox_file_system_.file_util());
   }
 
   const base::FilePath& test_directory() const {
     return data_dir_.path();
   }
@@ skipping 2234 matching lines @@
                                    false /* exclusive */,
                                    true /* recursive */));
   ASSERT_EQ(base::File::FILE_ERROR_NOT_A_DIRECTORY,
             ofu()->CreateDirectory(UnlimitedContext().get(),
                                    path_in_file_in_file,
                                    false /* exclusive */,
                                    true /* recursive */));
 }
 
 }  // namespace content