Add Team Drive subtree to the directory list view.

ui/file_manager/file_manager/common/js/unittest_util.js

Index: ui/file_manager/file_manager/common/js/unittest_util.js
diff --git a/ui/file_manager/file_manager/common/js/unittest_util.js b/ui/file_manager/file_manager/common/js/unittest_util.js
index a61fe34b8e1241058187746a1bf28241489ca00d..7f0b0cf9a2bba1b78d8e80badc907ff28fe95763 100644
--- a/ui/file_manager/file_manager/common/js/unittest_util.js
+++ b/ui/file_manager/file_manager/common/js/unittest_util.js
@@ -233,3 +233,28 @@ MockChromeStorageAPI.prototype.set_ = function(values, opt_callback) {
   if (opt_callback)
     opt_callback();
 };
+
+/**
+ * Mocks chrome.commandLinePrivate.
+ * @constructor
+ */
+function MockCommandLinePrivate() {
+  this.flags_ = {};
+  if (!chrome) {
+    chrome = {};
+  }
+  if (!chrome.commandLinePrivate) {
+    chrome.commandLinePrivate = {};
+  }
+  chrome.commandLinePrivate.hasSwitch = function(name, callback) {
+    callback(name in this.flags_);
+  }.bind(this);
+}
+
+/**
+ * Add a switch.
+ * @param {string} name of the switch to add.
+ */
+MockCommandLinePrivate.prototype.addSwitch = function(name) {
+  this.flags_[name] = true;
+};