Generalize volume configuration over all volumes.

ui/file_manager/file_manager/background/js/volume_manager.js

Index: ui/file_manager/file_manager/background/js/volume_manager.js
diff --git a/ui/file_manager/file_manager/background/js/volume_manager.js b/ui/file_manager/file_manager/background/js/volume_manager.js
index 8faa2387f632f9cce3540836d8979796c4ac58cd..0c0e6c8d516765b5d9bbe443e070356b638c3f33 100644
--- a/ui/file_manager/file_manager/background/js/volume_manager.js
+++ b/ui/file_manager/file_manager/background/js/volume_manager.js
@@ -852,7 +852,7 @@ VolumeManager.prototype.mountArchive = function(
 };
 
 /**
- * Unmounts volume.
+ * Unmounts a volume.
  * @param {!VolumeInfo} volumeInfo Volume to be unmounted.
  * @param {function()} successCallback Success callback.
  * @param {function(VolumeManagerCommon.VolumeError)} errorCallback Error
@@ -866,6 +866,25 @@ VolumeManager.prototype.unmount = function(volumeInfo,
   this.startRequest_(requestKey, successCallback, errorCallback);
 };
 
+/**
+ * Configures a volume.
+ * @param {!VolumeInfo} volumeInfo Volume to be configured.
+ * @return {!Promise} Fulfilled on success, otherwise rejected with an error
+ *     message.
+ */
+VolumeManager.prototype.configure = function(volumeInfo) {
+  return new Promise(function(fulfill, reject) {
+    chrome.fileManagerPrivate.configureVolume(
+        volumeInfo.volumeId,
+        function() {
+          if (chrome.runtime.lastError)
+            reject(chrome.runtime.lastError.message);
+          else
+            fulfill();
+        });
+  });
+};
+
 /** @override */
 VolumeManager.prototype.getVolumeInfo = function(entry) {
   return this.volumeInfoList.findByEntry(entry);