Performance dashboard identified a 2.2% regression in sizes/libcronet.so on android_cronet_builder at revision range 398673:398724. Graph: https://chromeperf.appspot.com/report?masters=ChromiumAndroid&bots=android_cronet_builder&tests=sizes%2Flibcronet.so&checked=libcronet.so%2Clibcronet.so_ref%2Cref&rev=398724


This is due to optimize_max being changed from -O2 to -O3 in http://crrev.com/398704. 

Cronet binary sizes increased across the board (arm, armv6, arm64, x86, and mips).

This is currently blocking Cronet's weekly release schedule.