use floor for mip-level choice
authorreed <reed@google.com>
Wed, 6 May 2015 20:02:37 +0000 (13:02 -0700)
committerCommit bot <commit-bot@chromium.org>
Wed, 6 May 2015 20:02:37 +0000 (13:02 -0700)
commitc1e1faae076a26e0706146e490a60d2894835cd5
treef6b7e350388190c4edfc92c404fcb13540f11d54
parenta85d4d0814818e4ddabb9237da209d61d6cd5854
use floor for mip-level choice

this chrome change must land first: https://codereview.chromium.org/1131663002/

BUG=skia:

Review URL: https://codereview.chromium.org/1131613002
src/core/SkMipMap.cpp