/usr/share/gocode/src/ is in golang-golang-x-oauth2-google-dev 0.0~git20161103.0.36bc617-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/golang.org/
/usr/share/gocode/src/golang.org/x/
/usr/share/gocode/src/golang.org/x/oauth2/
/usr/share/gocode/src/golang.org/x/oauth2/google/
/usr/share/gocode/src/golang.org/x/oauth2/google/appengine.go
/usr/share/gocode/src/golang.org/x/oauth2/google/appengine_hook.go
/usr/share/gocode/src/golang.org/x/oauth2/google/appenginevm_hook.go
/usr/share/gocode/src/golang.org/x/oauth2/google/default.go
/usr/share/gocode/src/golang.org/x/oauth2/google/example_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/google.go
/usr/share/gocode/src/golang.org/x/oauth2/google/google_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/jwt.go
/usr/share/gocode/src/golang.org/x/oauth2/google/jwt_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/sdk.go
/usr/share/gocode/src/golang.org/x/oauth2/google/sdk_test.go
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/gcloud/
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/gcloud/credentials
/usr/share/gocode/src/golang.org/x/oauth2/google/testdata/gcloud/properties