GitLab

Allow users to set the compression level while using CompressHelper().
There is a 2x to 4x compression speed difference between levels [1..9], where
it is possible to trade speed for better compression ratios
(and vice-versa).

It is up the user to experiment with the data to find the sweet spot
for its application (default compression level is 6).

Bug: 833361
Change-Id: Ia710cc7322707ace242133b283610eaa48def31f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912791
Commit-Queue: Adenilson Cavalcanti <cavalcantii@chromium.org>
Commit-Queue: Sam Maier <smaier@chromium.org>
Auto-Submit: Sam Maier <smaier@chromium.org>
Reviewed-by: Adenilson Cavalcanti <cavalcantii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715455}