Files.app: Fix closure error which will raised by the updated compiler.

ui/file_manager/file_manager/foreground/js/file_manager.js

Index: ui/file_manager/file_manager/foreground/js/file_manager.js
diff --git a/ui/file_manager/file_manager/foreground/js/file_manager.js b/ui/file_manager/file_manager/foreground/js/file_manager.js
index f00c03a4326dd6cb18a2a5b5eee5dbe92e25dde4..dc54a5fb346ca9574ef7d5597b78401c83d0bbc0 100644
--- a/ui/file_manager/file_manager/foreground/js/file_manager.js
+++ b/ui/file_manager/file_manager/foreground/js/file_manager.js
@@ -1147,7 +1147,7 @@ FileManager.prototype = /** @struct */ {
   };
 
   /**
-   * @param {DirectoryEntry} directoryEntry Directory to be opened.
+   * @param {!DirectoryEntry} directoryEntry Directory to be opened.
    * @param {Entry=} opt_selectionEntry Entry to be selected.
    * @param {string=} opt_suggestedName Suggested name for a non-existing\
    *     selection.
@@ -1222,9 +1222,9 @@ FileManager.prototype = /** @struct */ {
 
   /**
    * Return DirectoryEntry of the current directory or null.
-   * @return {DirectoryEntry} DirectoryEntry of the current directory. Returns
-   *     null if the directory model is not ready or the current directory is
-   *     not set.
+   * @return {DirectoryEntry|FakeEntry} DirectoryEntry of the current directory.
+   *     Returns null if the directory model is not ready or the current
+   *     directory is not set.
    */
   FileManager.prototype.getCurrentDirectoryEntry = function() {
     return this.directoryModel_ && this.directoryModel_.getCurrentDirEntry();