Tests: Add CompressBlob()/DecompressBlob() tests Test: angle_unittests --gtest_filter=DecompressTest* Bug: angleproject:42263322 Change-Id: I46880601e1fabde5bc56412b3f6619bd9fe4e907 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6039242 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Roman Lavrov <romanl@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>