/usr/share/gocode/src/google.golang.org/appengine/internal/ is in golang-google-appengine-dev 0.0~git20150606-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/google.golang.org/appengine/internal/aetesting/
/usr/share/gocode/src/google.golang.org/appengine/internal/aetesting/fake.go
/usr/share/gocode/src/google.golang.org/appengine/internal/api.go
/usr/share/gocode/src/google.golang.org/appengine/internal/api_classic.go
/usr/share/gocode/src/google.golang.org/appengine/internal/api_common.go
/usr/share/gocode/src/google.golang.org/appengine/internal/api_race_test.go
/usr/share/gocode/src/google.golang.org/appengine/internal/api_test.go
/usr/share/gocode/src/google.golang.org/appengine/internal/app_id.go
/usr/share/gocode/src/google.golang.org/appengine/internal/app_id_test.go
/usr/share/gocode/src/google.golang.org/appengine/internal/app_identity/
/usr/share/gocode/src/google.golang.org/appengine/internal/app_identity/app_identity_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/base/
/usr/share/gocode/src/google.golang.org/appengine/internal/base/api_base.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/channel/
/usr/share/gocode/src/google.golang.org/appengine/internal/channel/channel_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/datastore/
/usr/share/gocode/src/google.golang.org/appengine/internal/datastore/datastore_v3.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/identity.go
/usr/share/gocode/src/google.golang.org/appengine/internal/identity_classic.go
/usr/share/gocode/src/google.golang.org/appengine/internal/identity_vm.go
/usr/share/gocode/src/google.golang.org/appengine/internal/image/
/usr/share/gocode/src/google.golang.org/appengine/internal/image/images_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/internal.go
/usr/share/gocode/src/google.golang.org/appengine/internal/internal_test.go
/usr/share/gocode/src/google.golang.org/appengine/internal/log/
/usr/share/gocode/src/google.golang.org/appengine/internal/log/log_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/mail/
/usr/share/gocode/src/google.golang.org/appengine/internal/mail/mail_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/memcache/
/usr/share/gocode/src/google.golang.org/appengine/internal/memcache/memcache_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/metadata.go
/usr/share/gocode/src/google.golang.org/appengine/internal/modules/
/usr/share/gocode/src/google.golang.org/appengine/internal/modules/modules_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/net.go
/usr/share/gocode/src/google.golang.org/appengine/internal/net_test.go
/usr/share/gocode/src/google.golang.org/appengine/internal/remote_api/
/usr/share/gocode/src/google.golang.org/appengine/internal/remote_api/remote_api.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/search/
/usr/share/gocode/src/google.golang.org/appengine/internal/search/search.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/taskqueue/
/usr/share/gocode/src/google.golang.org/appengine/internal/taskqueue/taskqueue_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/transaction.go
/usr/share/gocode/src/google.golang.org/appengine/internal/urlfetch/
/usr/share/gocode/src/google.golang.org/appengine/internal/urlfetch/urlfetch_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/user/
/usr/share/gocode/src/google.golang.org/appengine/internal/user/user_service.pb.go
/usr/share/gocode/src/google.golang.org/appengine/internal/xmpp/
/usr/share/gocode/src/google.golang.org/appengine/internal/xmpp/xmpp_service.pb.go