brew install jpeg-turbo mozjpeg
And then: https://skia.org/user/build
Link brew installed libraries directly with gn flags. I spent 20 mins trying
to link against webp, but it did not work. In the end I disabled webp support.
bin/gn gen out/Shared --args='is_official_build=true skia_use_libwebp=false \
is_component_build=true extra_cflags=["-I/usr/local/opt/jpeg-turbo/include", \
"-I/usr/local/opt/icu4c/include"] \
extra_ldflags=["-L/usr/local/opt/jpeg-turbo/lib", \
"-L/usr/local/opt/icu4c/lib"]'