Stackable file_util for FileAPIs. Sample code for discussion. Incomplete. Cannot be compiled.

webkit/fileapi/file_system_operation_context.h

+// 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.
+
+#ifndef WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_
+#define WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_
+
+#include "base/basictypes.h"
+
+namespace fileapi {
+
+class FileSystemOperationContext {
+ public:
+  FileSystemOperationContext();
+  ~FileSystemOperationContext();
+
+  void SetAllowedGrowth(const int64& allowed_growth) {
+    allowed_growth_ = allowed_growth;
+  }
+
+  int64 GetAllowedGrowth() { return allowed_growth_; }
+
+ private:
+  int64 allowed_growth_;
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_