Enrich fileBrowserPrivate.onFileTransfersUpdated event to support displaying total number of jobs.

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 28 matching lines @@
   error_mount_program_failed,
   error_invalid_device_path,
   error_unknown_filesystem,
   error_unsupported_filesystem,
   error_invalid_archive,
   error_authentication,
   error_path_unmounted
 };
 
 // File transfer progress state.
-enum TransferState { started, in_progress, completed, failed };
+enum TransferState { added, started, in_progress, completed, failed };
 
 // Defines file transfer direction.
 enum TransferType { upload, download };
 
 // The type of the progress event.
 enum CopyProgressStatusType {
   // "begin_copy_entry" is fired for each entry (file or directory) before
   // starting the copy operation.
   begin_copy_entry,
 
@@ skipping 253 matching lines @@
   TransferState transferState;
 
   // Defines file transfer direction.
   TransferType transferType;
 
   // Approximated completed portion of the transfer operation.
   double? processed;
 
   // Approximated total size of transfer operation.
   double? total;
+
+  // Total number of jobs.
+  long num_total_jobs;
 };
 
 // Error during the drive sync.
 dictionary DriveSyncErrorEvent {
   // Error type.
   DriveSyncErrorType type;
 
   // File URL of the entry that the error happens to.
   DOMString fileUrl;
 };
@@ skipping 480 matching lines @@
 
   static void onPreferencesChanged();
 
   static void onDriveConnectionStatusChanged();
 
   static void onDeviceChanged(DeviceEvent event);
 
   static void onDriveSyncError(DriveSyncErrorEvent event);
 };
 };