copy from reviewboard/reviewboard/static/rb/js/diffviewer/collections/diffFileCollection.js
copy to reviewboard/reviewboard/static/rb/js/diffviewer/collections/diffFileCollection_mozreview.js

--- a/reviewboard/reviewboard/staticbundles.py
+++ b/reviewboard/reviewboard/staticbundles.py
@@ -241,17 +241,17 @@ PIPELINE_JS = dict({
             'rb/js/views/uploadDiffView.js',
             'rb/js/views/updateDiffView.js',
             'rb/js/diffviewer/models/diffCommentBlockModel.js',
             'rb/js/diffviewer/models/diffCommentsHintModel.js',
             'rb/js/diffviewer/models/diffFileModel.js',
             'rb/js/diffviewer/models/diffReviewableModel.js',
             'rb/js/diffviewer/models/diffRevisionModel.js',
             'rb/js/diffviewer/models/paginationModel.js',
-            'rb/js/diffviewer/collections/diffFileCollection.js',
+            'rb/js/diffviewer/collections/diffFileCollection_mozreview.js',
             'rb/js/diffviewer/views/chunkHighlighterView.js',
             'rb/js/diffviewer/views/diffCommentBlockView.js',
             'rb/js/diffviewer/views/diffCommentsHintView.js',
             'rb/js/diffviewer/views/diffComplexityIconView.js',
             'rb/js/diffviewer/views/diffFileIndexView.js',
             'rb/js/diffviewer/views/diffReviewableView_mozreview.js',
             'rb/js/diffviewer/views/diffRevisionLabelView.js',
             'rb/js/diffviewer/views/diffRevisionSelectorView.js',