Make fileInput progress bar change color on error (rstudio#1673)

* Make fileInput progress bar change color on error. Fixes rstudio#1672

* Grunt

* Update NEWS

Author: wch

NEWS.md

@@ -11,6 +11,8 @@ shiny 1.0.2.9000
 
 ### Bug fixes
 
+* Fixed [#1672](https://github.com/rstudio/shiny/issues/1672): When an error occurred while uploading a file, the progress bar did not change colors. ([#1673](https://github.com/rstudio/shiny/pull/1673))
+
 ### Library updates
 
 

inst/www/shared/shiny.js

@@ -169,7 +169,7 @@ $.extend(FileUploader.prototype, FileProcessor.prototype);
     this.$container().css('visibility', visible ? 'visible' : 'hidden');
   };
   this.$setError = function(error) {
-    this.$bar().toggleClass('bar-danger', (error !== null));
+    this.$bar().toggleClass('progress-bar-danger', (error !== null));
     if (error !== null) {
       this.onProgress(null, 1);
       this.$bar().text(error);