Enabling crc32 ARM instruction in zlib for ChromeOS.

Using the ARM crc32 instruction can boost the speed of gzip content
decompression, which can improve performances in cases where lots of
webpages are served using 'content-encoding: gzip'.

Expected to have ~50% decompression speed improvement on elm.

Bug: 848897, 810125
Change-Id: I9f090950209e6a68271c6926700b7335e14c7cbf
Reviewed-on: https://chromium-review.googlesource.com/c/1372548
Commit-Queue: Adenilson Cavalcanti <cavalcantii@chromium.org>
Reviewed-by: Adenilson Cavalcanti <cavalcantii@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#616210}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 9b3f32ad27fdd569e39289f241043f7111da78fa
1 file changed