Files.app: Provide detailed change information on onDirectoryChanged event

chrome/common/extensions/api/file_browser_private.idl

 // Copyright 2013 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.
 
 // fileBrowserPrivate API.
 // This is a private API used by the file browser of ChromeOS.
 [platforms=("chromeos"),
  implemented_in="chrome/browser/chromeos/extensions/file_manager/file_browser_private_api_functions.h"]
 namespace fileBrowserPrivate {
 // Type of the mounted volume.
@@ skipping 57 matching lines @@
   // "success" is fired after all entries are copied.
   success,
 
   // "error" is fired when an error occurs.
   error
 };
 
 // Specifies type of event that is raised.
 enum FileWatchEventType { changed, error };
 
+// Specifies type of change in file watch event.
+enum ChangeType { add_or_update, delete };
+
 // The type of entry that is needed. Default to ALL.
 enum SearchType { EXCLUDE_DIRECTORIES, SHARED_WITH_ME, OFFLINE, ALL };
 
 // Zooming mode.
 enum ZoomOperationType { in, out, reset };
 
 // Specifies how to open inspector.
 enum InspectionType {
   // Open inspector for foreground page.
   normal,
@@ skipping 266 matching lines @@
 
 // Payload data for file transfer cancel response.
 dictionary FileTransferCancelStatus {
   // URL of file that is being transfered.
   DOMString fileUrl;
 
   // True if ongoing transfer operation was found and canceled.
   boolean canceled;
 };
 
+// Detailed information of change.
+dictionary FileChange {
+  // URL of changed file (or directory).
+  DOMString url;
+
+  // Type of change, which may be multiple.
+  ChangeType[] changes;
+};
+
 // Directory change notification details.
 dictionary FileWatchEvent {
   // Specifies type of event that is raised.
   FileWatchEventType eventType;
 
   // An Entry object which represents a changed directory. The conversion into a
   // kind of FileEntry object is done in
   // file_browser_handler_custom_bindings.cc. For filesystem API's Entry
   // interface, see <a
   // href='http://www.w3.org/TR/file-system-api/#the-entry-interface'>The Entry
   // interface</a>.
   [instanceOf=Entry] object entry;
+
+  // Detailed change information of change. It would be null if the detailed
+  // information is not available.
+  FileChange[]? changedFiles;
 };
 
 dictionary Preferences {
   boolean driveEnabled;
   boolean cellularDisabled;
   boolean hostedFilesDisabled;
   boolean use24hourClock;
   boolean allowRedeemOffers;
 };
 
@@ skipping 411 matching lines @@
   static void onDriveSyncError(DriveSyncErrorEvent event);
 
   // Dispatched when a profile is added.
   static void onProfileAdded();
 
   // Dispatched when any window moves another desktop.
   // TODO(hirono): Add information which window is moved.
   static void onDesktopChanged();
 };
 };