Aosp builds -O2 instead of -Os -Os is rarely used in the native driver. Native driver actually has -O3 in e.g. gles entry points, and -O2 in most other places. We'll try to switch ANGLE standalone and Chrome to -O2 as well, so preferring -O2 here as well for now. In my local aosp builds the (sum of) binary size increase is as follows: -Os: 8.4M -O2: 9.0M (+7%) Bug: b/306391262 Change-Id: Id9d0b7607dbe9b7b40541df4469ecba20f4f76c9 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4969835 Auto-Submit: Roman Lavrov <romanl@google.com> Commit-Queue: Roman Lavrov <romanl@google.com> Reviewed-by: Charlie Lao <cclao@google.com> Reviewed-by: Cody Northrop <cnorthrop@google.com>