We try to have a silent build. But:

[6914/23168] ACTION //third_party/opus:convert_rtcd_assembler(//build/toolchain/android:android_clang_arm)
perl /usr/local/google/home/thakis/src/chrome/src/third_party/opus/src/celt/arm/arm2gnu.pl /usr/local/google/home/thakis/src/chrome/src/third_party/opus/src/celt/arm/celt_pitch_xcorr_arm.s | sed "s/OPUS_ARM_MAY_HAVE_[A-Z]*/1/g" | sed "/.include/d" > gen/third_party/opus/celt_pitch_xcorr_arm_gnu.S
[10196/23168] ACTION //third_party/junit:junit__compile_java__javac(//build/toolchain/android:android_clang_arm)


Looks like the print statement in https://chromium.googlesource.com/chromium/src/+blame/aa8ec6485091dda9862eb62960b881a60ef9e132/third_party/opus/convert_rtcd_assembler.py could just be deleted.