/usr/ is in libwebrtc-audio-processing-dev 0.1-2ubuntu1.
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/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/webrtc-audio-processing.pc
/usr/lib/x86_64-linux-gnu/libwebrtc_audio_processing.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libwebrtc-audio-processing-dev/
/usr/share/doc/libwebrtc-audio-processing-dev/copyright
/usr/share/doc/libwebrtc-audio-processing-dev/NEWS.gz
/usr/share/doc/libwebrtc-audio-processing-dev/README
/usr/include/
/usr/include/webrtc_audio_processing/
/usr/include/webrtc_audio_processing/typedefs.h
/usr/include/webrtc_audio_processing/common_types.h
/usr/include/webrtc_audio_processing/module.h
/usr/include/webrtc_audio_processing/module_common_types.h
/usr/include/webrtc_audio_processing/audio_processing.h
/usr/lib/x86_64-linux-gnu/libwebrtc_audio_processing.so
/usr/share/doc/libwebrtc-audio-processing-dev/changelog.Debian.gz