Actually disable FilesApp ZipTests in DEBUG

defined(DEBUG) => !defined(NDEBUG)

Bug: 936429
Change-Id: I6b8b9402c32af0defd043bf20debf4ce417abe82
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636995
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664692}
1 file changed