[fsp] Rename ObserveEntry with AddWatcher.

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 <set>
-#include <string>
-
-#include "base/files/file_path.h"
-#include "url/gurl.h"
-
-namespace chromeos {
-namespace file_system_provider {
-
-struct ObservedEntry;
-struct Subscriber;
-
-// Key for storing an observed entry in the map. There may be two observers
-// per path, as long as one is recursive, and the other one not.
-struct ObservedEntryKey {
-  ObservedEntryKey(const base::FilePath& entry_path, bool recursive);
-  ~ObservedEntryKey();
-
-  struct Comparator {
-    bool operator()(const ObservedEntryKey& a, const ObservedEntryKey& b) const;
-  };
-
-  base::FilePath entry_path;
-  bool recursive;
-};
-
-// List of observed entries.
-typedef std::map<ObservedEntryKey, ObservedEntry, ObservedEntryKey::Comparator>
-    ObservedEntries;
-
-// Map of subscribers for notifications about an observed entry.
-typedef std::map<GURL, Subscriber> Subscribers;
-
-// Represents a subscriber for notification about an observed entry. There may
-// be up to one subscriber per origin for the same observed entry.
-struct Subscriber {
-  Subscriber();
-  ~Subscriber();
-
-  // Origin of the subscriber.
-  GURL origin;
-
-  // Whether the subscriber should be restored after shutdown or not.
-  bool persistent;
-};
-
-// Represents an observed entry on a file system.
-struct ObservedEntry {
-  ObservedEntry();
-  ~ObservedEntry();
-
-  // Map of subscribers for notifications of the observed entry.
-  Subscribers subscribers;
-
-  // Path of the observed entry.
-  base::FilePath entry_path;
-
-  // Whether observing is recursive or not.
-  bool recursive;
-
-  // Tag of the last notification for this observed entry. May be empty if not
-  // supported.
-  std::string last_tag;
-};
-
-}  // namespace file_system_provider
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OBSERVED_ENTRY_H_