[fsp] Extract ObservedEntry and ObservedEntries to a separate file.

chrome/browser/chromeos/file_system_provider/observed_entry.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_OBSERVED_ENTRY_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OBSERVED_ENTRY_H_
+
+#include <map>
+#include <string>
+
+#include "base/files/file_path.h"
+
+namespace chromeos {
+namespace file_system_provider {
+
+struct ObservedEntry;
+
+// List of observed entries.
+typedef std::map<base::FilePath, ObservedEntry> ObservedEntries;
+
+// Represents an observed entry on a file system.
+struct ObservedEntry {
+  ObservedEntry();
+  ~ObservedEntry();
+
+  base::FilePath entry_path;
+  bool recursive;
+  std::string last_tag;
+};
+
+}  // namespace file_system_provider
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OBSERVED_ENTRY_H_