[filemanager] Move GData properties to metadata cache.

chrome/browser/resources/file_manager/js/directory_model.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.
 
 // If directory files changes too often, don't rescan directory more than once
 // per specified interval
 var SIMULTANEOUS_RESCAN_INTERVAL = 1000;
 // Used for operations that require almost instant rescan.
 var SHORT_RESCAN_INTERVAL = 100;
 
@@ skipping 1212 matching lines @@
   if (entries.length == 0) {
     this.successCallback_();
     this.recordMetrics_();
     return;
   }
 
   // Splice takes the to-be-spliced-in array as individual parameters,
   // rather than as an array, so we need to perform some acrobatics...
   var spliceArgs = [].slice.call(entries);
 
-  for (filterName in this.filters_) {
+  for (var filterName in this.filters_) {
     spliceArgs = spliceArgs.filter(this.filters_[filterName]);
   }
 
   var self = this;
   self.preprocessChunk_(spliceArgs, function() {
     spliceArgs.unshift(0, 0);  // index, deleteCount
     self.list_.splice.apply(self.list_, spliceArgs);
 
     // Keep reading until entries.length is 0.
     self.readNextChunk_();
   });
 };
 
 /**
  * @private
  */
 DirectoryModel.Scanner.prototype.recordMetrics_ = function() {
   metrics.recordInterval('DirectoryScan');
   if (this.dir_.fullPath ==
       '/' + DirectoryModel.DOWNLOADS_DIRECTORY) {
     metrics.recordMediumCount('DownloadsCount', this.list_.length);
   }
 };