Removed calls to Entry.file() to read file sizes. We get this information from Entry.getMetadata() …

chrome/browser/resources/file_manager/js/file_manager.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.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 const EMPTY_IMAGE_URI = 'data:image/gif;base64,'
         + 'R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw%3D%3D';
 
 /**
@@ skipping 287 matching lines @@
   function cacheEntrySize(entry, successCallback, opt_errorCallback, opt_sync) {
     if (entry.isDirectory) {
       // No size for a directory, -1 ensures it's sorted before 0 length files.
       entry.cachedSize_ = -1;
     }
 
     if ('cachedSize_' in entry) {
       invokeCallback(successCallback, !!opt_sync, entry);
       return;
     }
-
-    batchAsyncCall(entry, 'file', function(file) {
-      entry.cachedSize_ = file.size;
-      if (successCallback)
-        successCallback(entry);
-    }, opt_errorCallback);
   }
 
   /**
    * Get the mtime of a file, caching the result.
    *
    * When this method completes, the fileEntry object will get a
    * 'cachedMtime_' property (if it doesn't already have one) containing the
    * last modified time of the file as a Date object.
    *
    * @param {Entry} entry An HTML5 Entry object.
    * @param {function(Entry)} successCallback The function to invoke once the
    *     mtime is known.
    * @param {function=} opt_errorCallback Error callback.
    * @param {boolean=} opt_sync True, if callback should be called sync instead
    *     of async.
    */
   function cacheEntryDate(entry, successCallback, opt_errorCallback, opt_sync) {
     if ('cachedMtime_' in entry) {
       invokeCallback(successCallback, !!opt_sync, entry);
       return;
     }
 
     if (entry.isFile) {
-      batchAsyncCall(entry, 'file', function(file) {
-        entry.cachedMtime_ = file.lastModifiedDate;
+      batchAsyncCall(entry, 'getMetadata', function(metadata) {
+        entry.cachedMtime_ = metadata.modificationTime;
+        entry.cachedSize_ = metadata.size;
         if (successCallback)
           successCallback(entry);
       });
     } else {
       batchAsyncCall(entry, 'getMetadata', function(metadata) {
         entry.cachedMtime_ = metadata.modificationTime;
         if (successCallback)
           successCallback(entry);
       }, opt_errorCallback);
     }
@@ skipping 3588 matching lines @@
           });
       }, onError);
 
       function onError(err) {
         console.log('Error while checking free space: ' + err);
         setTimeout(doCheck, 1000 * 60);
       }
     }
   }
 })();