Add override for overridden function in zlib

Bug: 428099
Change-Id: I33a10720a3231dec560aa431dba182929226f664
Reviewed-on: https://chromium-review.googlesource.com/1036716
Reviewed-by: Satoru Takabayashi <satorux@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#555252}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 13c84bee352ae6bbba4eec8054e9ef2db82d8f6c
1 file changed