Files.app: Fix the bug on search

On search on Files.app, it fails due to exception, because of the regression caused by r275418. This patch fixes it.

BUG=382332
TEST=manually tested

Review URL: https://codereview.chromium.org/321753003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275791 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -963,7 +963,6 @@ DirectoryModel.prototype.search = function(query,
             this.currentFileListContext_,
             currentDirEntry);
         this.clearAndScan_(newDirContents,
-                           sequence,
                            callback);
       } else {
         callback();
@@ -982,7 +981,6 @@ DirectoryModel.prototype.search = function(query,
     this.onClearSearch_ = onClearSearch;
     this.addEventListener('scan-completed', this.onSearchCompleted_);
     this.clearAndScan_(newDirContents,
-                       sequence,
                        callback);
   }.bind(this, this.changeDirectorySequence_));
 };