Add isGenericFileHandler property to FileTask.

chrome/common/extensions/api/file_manager_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.
 
 // fileManagerPrivate API.
 // This is a private API used by the file browser of ChromeOS.
 [platforms=("chromeos"),
  implemented_in="chrome/browser/chromeos/extensions/file_manager/file_manager_private_api_functions.h"]
 namespace fileManagerPrivate {
 // Type of the mounted volume.
@@ skipping 149 matching lines @@
   DOMString taskId;
 
   // Task title (ex. App name).
   DOMString title;
 
   // Task icon url (from chrome://extension-icon/...)
   DOMString iconUrl;
 
   // True if this task is a default task for the selected files.
   boolean isDefault;
+
+  // True if this task is from generic file handler. Generic file handler is a
+  // file handler which handles any type of files (e.g. extensions: ["*"],
+  // types: ["*/*"]). Partial wild card (e.g. types: ["image/*"]) is not
+  // generic file handler.
+  boolean isGenericFileHandler;
 };
 
 // Additional entry properties.
 dictionary EntryProperties {
   // Size of this file.
   double? fileSize;
 
   // Timestamp of entry update time, in milliseconds past the epoch.
   double? lastModifiedTime;
 
@@ skipping 627 matching lines @@
 
   static void onPreferencesChanged();
 
   static void onDriveConnectionStatusChanged();
 
   static void onDeviceChanged(DeviceEvent event);
 
   static void onDriveSyncError(DriveSyncErrorEvent event);
 };
 };