Show correct size when MR diff overflows

The problem is that we often go via a diff object constructed from the diffs
stored in the DB. Those diffs, by definition, don't overflow, so we don't have
access to the 'correct' `real_size` - that is stored on the MR diff object
iself.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/gitlab/diff/file_collection/merge_request_diff.rb b/lib/gitlab/diff/file_collection/merge_request_diff.rb
index 329d12f13d1..0bd226ef050 100644
--- a/lib/gitlab/diff/file_collection/merge_request_diff.rb
+++ b/lib/gitlab/diff/file_collection/merge_request_diff.rb
@@ -15,6 +15,10 @@ module Gitlab
           super.tap { |_| store_highlight_cache }
         end
 
+        def real_size
+          @merge_request_diff.real_size
+        end
+
         private
 
         # Extracted method to highlight in the same iteration to the diff_collection.