/usr/include/gstreamer-0.10/gst/interfaces/ is in libgstreamer-plugins-base0.10-dev 0.10.36-1.1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gstreamer-0.10/gst/interfaces/colorbalance.h
/usr/include/gstreamer-0.10/gst/interfaces/colorbalancechannel.h
/usr/include/gstreamer-0.10/gst/interfaces/interfaces-enumtypes.h
/usr/include/gstreamer-0.10/gst/interfaces/mixer.h
/usr/include/gstreamer-0.10/gst/interfaces/mixeroptions.h
/usr/include/gstreamer-0.10/gst/interfaces/mixertrack.h
/usr/include/gstreamer-0.10/gst/interfaces/navigation.h
/usr/include/gstreamer-0.10/gst/interfaces/propertyprobe.h
/usr/include/gstreamer-0.10/gst/interfaces/streamvolume.h
/usr/include/gstreamer-0.10/gst/interfaces/tuner.h
/usr/include/gstreamer-0.10/gst/interfaces/tunerchannel.h
/usr/include/gstreamer-0.10/gst/interfaces/tunernorm.h
/usr/include/gstreamer-0.10/gst/interfaces/videoorientation.h
/usr/include/gstreamer-0.10/gst/interfaces/xoverlay.h