Add a data source field for volumes.

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 155 matching lines @@
   shared,
   externalFileUrl
 };
 
 // Entry property visibility for setEntryTag();
 enum EntryTagVisibility {
   private,
   public
 };
 
+// Source of the volume data.
+enum VolumeSource {
+  // Represents a mounted file. In most cases, simply an archive.
+  file,
+
+  // Representing a device, eg. an MTP device. Also, used for Downloads as it's
+  // containing files stored on the Chrome OS device.
+  device,
+
+  // Used for volumes which contain files on a remote machine, eg. Drive or
+  // cloud services implemented via the File System Provider API.
+  network
+};
+
 // A file task represents an action that the file manager can perform over the
 // currently selected files. See
 // chrome/browser/chromeos/extensions/file_manager/file_tasks.h for details
 // about how file tasks are handled.
 dictionary FileTask {
   // The unique identifier of the task.
   DOMString taskId;
 
   // Task title (ex. App name).
   DOMString title;
@@ skipping 87 matching lines @@
   // TODO(hirono): Remove the property because of the design change of
   // multi-profile suuport.
   boolean isCurrentProfile;
 };
 
 // Mounted disk volume metadata.
 dictionary VolumeMetadata {
   // ID of the disk volume.
   DOMString volumeId;
 
-  // Id the provided file system (for proviided file systems).
+  // Id the provided file system (for provided file systems).
   DOMString? fileSystemId;
 
   // Extension providing this volume (for provided file systems).
   DOMString? extensionId;
 
+  // Source of the volume data.
+  VolumeSource? volumeSource;
+
   // Label of the volume (if available).
   DOMString? volumeLabel;
 
   // Description of the profile where the volume belongs.
   // TODO(hirono): Remove the property because of the design change of
   // multi-profile support.
   ProfileInfo profile;
 
   // The path to the mounted device, archive file or network resource.
   DOMString? sourcePath;
@@ skipping 589 matching lines @@
 
   static void onPreferencesChanged();
 
   static void onDriveConnectionStatusChanged();
 
   static void onDeviceChanged(DeviceEvent event);
 
   static void onDriveSyncError(DriveSyncErrorEvent event);
 };
 };