/usr/include/ is in libgooglepinyin0-dev 0.1.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/googlepinyin/
/usr/include/googlepinyin/atomdictbase.h
/usr/include/googlepinyin/dictbuilder.h
/usr/include/googlepinyin/dictdef.h
/usr/include/googlepinyin/dictlist.h
/usr/include/googlepinyin/dicttrie.h
/usr/include/googlepinyin/lpicache.h
/usr/include/googlepinyin/matrixsearch.h
/usr/include/googlepinyin/mystdlib.h
/usr/include/googlepinyin/ngram.h
/usr/include/googlepinyin/pinyinime.h
/usr/include/googlepinyin/searchutility.h
/usr/include/googlepinyin/spellingtable.h
/usr/include/googlepinyin/spellingtrie.h
/usr/include/googlepinyin/splparser.h
/usr/include/googlepinyin/sync.h
/usr/include/googlepinyin/userdict.h
/usr/include/googlepinyin/utf16char.h
/usr/include/googlepinyin/utf16reader.h