Fix butter bar hide on timeout.

chrome/browser/resources/file_manager/js/butter_bar.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.
 
 /**
  * The minimum about of time to display the butter bar for, in ms.
  * Justification is 1000ms for minimum display time plus 300ms for transition
  * duration.
  */
 var MINIMUM_BUTTER_DISPLAY_TIME_MS = 1300;
@@ skipping 151 matching lines @@
     return false;
   }
 };
 
 /**
  * Clear the show timeout if it is set.
  * @private
  */
 ButterBar.prototype.clearShowTimeout_ = function() {
   if (this.showTimeout_) {
-    clearTimeout(this.hideTimeout_);
+    clearTimeout(this.showTimeout_);
     this.showTimeout_ = null;
   }
 };
 
 /**
  * Clear the hide timeout if it is set.
  * @private
  */
 ButterBar.prototype.clearHideTimeout_ = function() {
   if (this.hideTimeout_) {
@@ skipping 91 matching lines @@
       } else {
         this.showError_(strf(this.transferType_() + '_UNEXPECTED_ERROR',
                              event.error));
       }
       break;
 
     default:
       console.log('Unknown "copy-progress" event reason: ' + event.reason);
   }
 };