thakis@thakis:~/src/chrome/src$ ls -hl out/gnand7/gen/chrome/android/chrome_public_apk__prepare_native/packed-libs/libchrome.so
-rwxr-x--- 1 thakis eng 65M Oct 10 17:21 out/gnand7/gen/chrome/android/chrome_public_apk__prepare_native/packed-libs/libchrome.so
is_clang = true
thakis@thakis:~/src/chrome/src$ ls -hl out/gnand8/gen/chrome/android/chrome_public_apk__prepare_native/packed-libs/libchrome.so
-rwxr-x--- 1 thakis eng 68M Oct 11 10:55 out/gnand8/gen/chrome/android/chrome_public_apk__prepare_native/packed-libs/libchrome.so

(first is gcc, second is clang)

3MB binary size difference.