Files.app: Fix closure compiler errors.

ui/file_manager/file_manager/foreground/js/metadata/metadata_cache.js

 // Copyright (c) 2012 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.
 
 /**
  * MetadataCache is a map from Entry to an object containing properties.
  * Properties are divided by types, and all properties of one type are accessed
  * at once.
  * Some of the properties:
  * {
@@ skipping 851 matching lines @@
       function(propertiesList) {
         console.assert(propertiesList.length === callbacks.length);
         for (var i = 0; i < callbacks.length; i++) {
           callbacks[i](self.convert_(propertiesList[i], entries[i]));
         }
       });
 };
 
 /**
  * Converts API metadata to internal format.
- * @param {Object} data Metadata from API call.
- * @param {Entry} entry File entry.
- * @return {Object} Metadata in internal format.
+ * @param {!EntryProperties} data Metadata from API call.
+ * @param {!Entry} entry File entry.
+ * @return {!Object} Metadata in internal format.
  * @private
  */
 ExternalProvider.prototype.convert_ = function(data, entry) {
   var result = {};
   result.external = {
     present: data.isPresent,
     pinned: data.isPinned,
     hosted: data.isHosted,
     dirty: data.isDirty,
     imageWidth: data.imageWidth,
@@ skipping 238 matching lines @@
 
 /**
  * Handles the 'log' message from the worker.
  * @param {Array.<*>} arglist Log arguments.
  * @private
  */
 ContentProvider.prototype.onLog_ = function(arglist) {
   if (MetadataCache.log)  // Avoid log spam by default.
     console.log.apply(console, ['metadata:'].concat(arglist));
 };