Making delete function more clear

Author: Victor Nazzaro

src/UI/eraser.js

@@ -35,7 +35,7 @@ function erase(target){
         n.parentNode.removeChild(n);
       });
 
-      PDFJSAnnotate.getStoreAdapter().deleteAnnotation(documentId, annotationId);
+      PDFJSAnnotate.getStoreAdapter().deleteAnnotation(documentId, userId, annotationId);
     }
   }
 }

src/adapter/StoreAdapter.js

@@ -99,10 +99,10 @@ export default class StoreAdapter {
   __deleteAnnotation(documentId, annotationId) { abstractFunction('deleteAnnotation'); }
   get deleteAnnotation() { return this.__deleteAnnotation; }
   set deleteAnnotation(fn) {
-    this.__deleteAnnotation = function deleteAnnotation(documentId, annotationId) {
+    this.__deleteAnnotation = function deleteAnnotation(documentId, userId, annotationId) {
       return fn(...arguments).then((success) => {
         if (success) {
-          fireEvent('annotation:delete', documentId, annotationId);
+          fireEvent('annotation:delete', documentId, userId, annotationId);
         }
         return success;
       });

web/index.js

@@ -4,7 +4,7 @@ import initColorPicker from './shared/initColorPicker';
 
 const { UI } = PDFJSAnnotate;
 const documentId = 'example.pdf';
-const userId = 'instructor';
+const userId = 'aphacker';
 let PAGE_HEIGHT;
 let RENDER_OPTIONS = {
   documentId,