[fsp] Refactor handling operations.

chrome/browser/chromeos/file_system_provider/operations/unmount.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_OPERATIONS_UNMOUNT_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNMOUNT_H_
+
+#include "base/files/file.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chromeos/file_system_provider/operations/operation.h"
+#include "webkit/browser/fileapi/async_file_util.h"
+
+namespace base {
+class DictionaryValue;
+}  // namespace base
+
+namespace extensions {
+class EventRouter;
+}  // namespace extensions
+
+namespace chromeos {
+namespace file_system_provider {
+
+class ProvidedFileSystemInfo;
+
+namespace operations {
+
+// Bridge between fileBrowserPrivate's unmount operation and providing
+// extension's unmount request. Created per request.
+class Unmount : public Operation {
+ public:
+  Unmount(extensions::EventRouter* event_router,
+          const ProvidedFileSystemInfo& file_system_info,
+          const fileapi::AsyncFileUtil::StatusCallback& callback);
+  virtual ~Unmount();
+
+  // Operation overrides.
+  virtual bool Execute(int request_id) OVERRIDE;
+  virtual void OnSuccess(int request_id,
+                         scoped_ptr<RequestValue> result,
+                         bool has_next) OVERRIDE;
+  virtual void OnError(int request_id, base::File::Error error) OVERRIDE;
+
+ private:
+  const fileapi::AsyncFileUtil::StatusCallback callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(Unmount);
+};
+
+}  // namespace operations
+}  // namespace file_system_provider
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNMOUNT_H_