Now we respect comments before the first variable.

Bug: 760633
Change-Id: Ibe60d719429c033415bfb1c99942c9d04601d967
Reviewed-on: https://chromium-review.googlesource.com/998683
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Reviewed-by: Aaron Gable <agable@chromium.org>