Print Preview: Hiding margins UI if an error occurs.

chrome/browser/resources/print_preview/margin_settings.js

 // Copyright (c) 2011 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.
 
 cr.define('print_preview', function() {
   'use strict';
 
   /**
    * Creates a Margins object that holds four margin values. The units in which
    * the values are expressed can be any numeric value.
@@ skipping 273 matching lines @@
       this.marginsUI.show();
     },
 
     /**
      * Adds listeners to all margin related controls.
      * @private
      */
     addEventListeners_: function() {
       this.marginList_.onchange = this.onMarginsChanged_.bind(this);
       document.addEventListener('PDFLoaded', this.onPDFLoaded_.bind(this));
+      document.addEventListener('PDFGenerationError',
+                                this.onPDFGenerationError_.bind(this));
     },
 
     /**
+     * Executes when an 'PDFGenerationError' event occurs.
+     * @private
+     */
+    onPDFGenerationError_: function() {
+      if (this.isCustomMarginsSelected()) {
+        this.removeCustomMarginEventListeners_();
+        this.marginsUI.hide();
+      }
+    },
+
+    /**
      * Executes whenever a "DragEvent" occurs.
      * @param {cr.Event} e The event that triggered this listener.
      */
     onDragEvent_: function(e) {
       var dragDeltaInPoints = this.convertDragDeltaToPoints_(e.dragDelta);
       this.marginsUI.lastClickedMarginsUIPair.updateWhileDragging(
           dragDeltaInPoints, e.destinationPoint);
     },
 
     /**
@@ skipping 284 matching lines @@
       if (!previewModifiable)
         fadeOutElement(this.marginsOption_);
     }
   };
 
   return {
     MarginSettings: MarginSettings,
     PageLayout: PageLayout,
   };
 });