[fsp] Refactor handling operations.

chrome/browser/chromeos/file_system_provider/request_value.h

+// Copyright 2014 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 CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_VALUE_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_VALUE_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/common/extensions/api/file_system_provider_internal.h"
+
+namespace chromeos {
+namespace file_system_provider {
+
+// Holds a parsed value returned by a providing extension. Each accessor can
+// return NULL in case the requested value type is not available. It is used
+// to pass values of success callbacks.
+class RequestValue {
+ public:
+  // Creates an empty value. Use static methods to create a value holding a
+  // proper content.
+  RequestValue();
+
+  virtual ~RequestValue();
+
+  static scoped_ptr<RequestValue> CreateForUnmountSuccess(
+      scoped_ptr<extensions::api::file_system_provider_internal::
+                     UnmountRequestedSuccess::Params> params);
+
+  static scoped_ptr<RequestValue> CreateForTesting(const std::string& params);
+
+  const std::string* testing_params() const { return testing_params_.get(); }
+
+  const extensions::api::file_system_provider_internal::
+      UnmountRequestedSuccess::Params*
+      unmount_success_params() const {
+    return unmount_success_params_.get();
+  }
+
+ private:
+  scoped_ptr<extensions::api::file_system_provider_internal::
+                 UnmountRequestedSuccess::Params> unmount_success_params_;
+  scoped_ptr<std::string> testing_params_;
+
+  DISALLOW_COPY_AND_ASSIGN(RequestValue);
+};
+
+}  // namespace file_system_provider
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_VALUE_H_