Remove unnecessary int cast in ParseContext. BUG=angle:536 Change-Id: I72287f5ce9736cd48fc241022e09446db717cf92 Reviewed-on: https://chromium-review.googlesource.com/181770 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Nicolas Capens <nicolascapens@chromium.org> Commit-Queue: Nicolas Capens <nicolascapens@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>