Add Team Drive subtree to the directory list view.

ui/file_manager/file_manager/common/js/volume_manager_common.js

Index: ui/file_manager/file_manager/common/js/volume_manager_common.js
diff --git a/ui/file_manager/file_manager/common/js/volume_manager_common.js b/ui/file_manager/file_manager/common/js/volume_manager_common.js
index 6c5e9420762e2ee1ef8bc90ea29ae07c650d5f25..35c4b451f51395f29d8c3f64a5b7fa5fd5ad72e0 100644
--- a/ui/file_manager/file_manager/common/js/volume_manager_common.js
+++ b/ui/file_manager/file_manager/common/js/volume_manager_common.js
@@ -37,6 +37,9 @@ VolumeManagerCommon.RootType = {
   // Root for a drive volume.
   DRIVE: 'drive',
 
+  // Root for all Team Drives.
+  TEAM_DRIVES: 'team_drives',
+
   // Root for a MTP volume.
   MTP: 'mtp',
 
@@ -62,6 +65,29 @@ VolumeManagerCommon.RootType = {
 Object.freeze(VolumeManagerCommon.RootType);
 
 /**
+ * Type of an entry.
+ * @enum {string}
+ * @const
+ */
+VolumeManagerCommon.EntryType = {
+  // The root entry of a volume.
+  VOLUME_ROOT: 'volume_root',
+
+  // Fake entry. (e.g. Special search roots)
+  FAKE_ENTRY: 'fake_entry',
+
+  // The grand root entry of Team Drives in Drive volume.
+  TEAM_DRIVES_GRAND_ROOT: 'team_drives_grand_root',
+
+  // The grand root entry of Team Drives in Drive volume.
+  TEAM_DRIVE_ROOT: 'team_drive_root',
+
+  // Other entries, like a normal directory in Drive and Downloads.
+  OTHER: 'other'
+};
+Object.freeze(VolumeManagerCommon.EntryType);
+
+/**
  * Error type of VolumeManager.
  * @enum {string}
  * @const
@@ -179,6 +205,7 @@ VolumeManagerCommon.getVolumeTypeFromRootType = function(rootType) {
     case VolumeManagerCommon.RootType.REMOVABLE:
       return VolumeManagerCommon.VolumeType.REMOVABLE;
     case VolumeManagerCommon.RootType.DRIVE:
+    case VolumeManagerCommon.RootType.TEAM_DRIVES:
     case VolumeManagerCommon.RootType.DRIVE_OTHER:
     case VolumeManagerCommon.RootType.DRIVE_OFFLINE:
     case VolumeManagerCommon.RootType.DRIVE_SHARED_WITH_ME:
@@ -259,3 +286,7 @@ var FakeEntry;
   * @const {string}
   */
 VolumeManagerCommon.VOLUME_ALREADY_MOUNTED = 'volume_already_mounted';
+
+VolumeManagerCommon.TEAM_DRIVES_DIRECTORY_NAME = 'team_drives';
+VolumeManagerCommon.TEAM_DRIVES_DIRECTORY_PATH =
+    '/' + VolumeManagerCommon.TEAM_DRIVES_DIRECTORY_NAME;