/usr/ is in libbrotli-dev 1.0.3-1ubuntu1.
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..
/usr/include/
/usr/include/brotli/
/usr/include/brotli/decode.h
/usr/include/brotli/encode.h
/usr/include/brotli/port.h
/usr/include/brotli/types.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libbrotlicommon.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libbrotlidec.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libbrotlienc.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libbrotli-dev/
/usr/share/doc/libbrotli-dev/copyright
/usr/lib/x86_64-linux-gnu/libbrotlicommon.so
/usr/lib/x86_64-linux-gnu/libbrotlidec.so
/usr/lib/x86_64-linux-gnu/libbrotlienc.so
/usr/share/doc/libbrotli-dev/changelog.Debian.gz