third_party/libwebp/fuzzing: Disable ExtractAndCropOrScale()

WEBP_REDUCE_SIZE is defined in chromium, disabling WebPPictureCrop()
and WebPPictureRescale(), crashing ExtractAndCropOrScale() in fuzz.h.
Disable ExtractAndCropOrScale() without returning an error when
WEBP_REDUCE_SIZE is defined.

BUG=chromium:912455

Change-Id: I10f66de59498f664d7e0603cfd10698fa3f5f114
Reviewed-on: https://chromium-review.googlesource.com/c/1368108
Commit-Queue: Yannis Guyon <yguyon@google.com>
Reviewed-by: James Zern <jzern@google.com>
Cr-Commit-Position: refs/heads/master@{#615594}
1 file changed