Fix SelectFileDialogExtensionBrowserTest.SelectFileAndSave javascript error.

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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 3729 matching lines @@
    */
   FileManager.prototype.onKeyDown_ = function(event) {
     if (event.srcElement === this.renameInput_) {
       // Ignore keydown handler in the rename input box.
       return;
     }
 
     switch (util.getKeyModifiers(event) + event.keyCode) {
       case 'Ctrl-190':  // Ctrl-. => Toggle filter files.
         var dm = this.directoryModel_;
-        dm.setFilterHidden(!dm.getFilterHidden());
+        dm.setFilterHidden(!dm.isFilterHiddenOn());
         event.preventDefault();
         return;
 
       case '27':  // Escape => Cancel dialog.
         if (this.copyManager_ &&
             this.copyManager_.getStatus().totalFiles != 0) {
           // If there is a copy in progress, ESC will cancel it.
           event.preventDefault();
           this.copyManager_.requestCancel();
           return;
@@ skipping 440 matching lines @@
   FileManager.prototype.validateFileName_ = function(name, opt_onDone) {
     var onDone = opt_onDone || function() {};
     var msg;
     var testResult = /[\/\\\<\>\:\?\*\"\|]/.exec(name);
     if (testResult) {
       msg = strf('ERROR_INVALID_CHARACTER', testResult[0]);
     } else if (/^\s*$/i.test(name)) {
       msg = str('ERROR_WHITESPACE_NAME');
     } else if (/^(CON|PRN|AUX|NUL|COM[1-9]|LPT[1-9])$/i.test(name)) {
       msg = str('ERROR_RESERVED_NAME');
-    } else if (this.directoryModel_.getFilterHidden() && name[0] == '.') {
+    } else if (this.directoryModel_.isFilterHiddenOn() && name[0] == '.') {
       msg = str('ERROR_HIDDEN_NAME');
     }
 
     if (msg) {
       this.alert.show(msg, onDone);
       return false;
     }
 
     onDone();
     return true;
@@ skipping 107 matching lines @@
 
       handleSplitterDragEnd: function(e) {
         Splitter.prototype.handleSplitterDragEnd.apply(this, arguments);
         this.ownerDocument.documentElement.classList.remove('col-resize');
       }
     };
 
     customSplitter.decorate(splitterElement);
   };
 })();