Use window.course instead of window.section

cms/static/js/views/edit_chapter.js

@@ -53,7 +53,7 @@ define(["backbone", "underscore", "underscore.string", "jquery", "gettext", "js/
             });
             var msg = new FileUploadModel({
                 title: _.template(gettext("Upload a new PDF to “<%= name %>”"),
-                    {name: section.escape('name')}),
+                    {name: course.escape('name')}),
                 message: "Files must be in PDF format.",
                 mimeTypes: ['application/pdf']
             });

cms/static/js/views/show_textbook.js

@@ -16,7 +16,7 @@ define(["backbone", "underscore", "gettext", "js/views/feedback_notification", "
         render: function() {
             var attrs = $.extend({}, this.model.attributes);
             attrs.bookindex = this.model.collection.indexOf(this.model);
-            attrs.course = window.section.attributes;
+            attrs.course = window.course.attributes;
             this.$el.html(this.template(attrs));
             return this;
         },