/usr/include/google/ is in libprotobuf-dev 2.4.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/google/protobuf/
/usr/include/google/protobuf/descriptor.h
/usr/include/google/protobuf/descriptor.pb.h
/usr/include/google/protobuf/descriptor.proto
/usr/include/google/protobuf/descriptor_database.h
/usr/include/google/protobuf/dynamic_message.h
/usr/include/google/protobuf/extension_set.h
/usr/include/google/protobuf/generated_message_reflection.h
/usr/include/google/protobuf/generated_message_util.h
/usr/include/google/protobuf/io/
/usr/include/google/protobuf/io/coded_stream.h
/usr/include/google/protobuf/io/gzip_stream.h
/usr/include/google/protobuf/io/printer.h
/usr/include/google/protobuf/io/tokenizer.h
/usr/include/google/protobuf/io/zero_copy_stream.h
/usr/include/google/protobuf/io/zero_copy_stream_impl.h
/usr/include/google/protobuf/io/zero_copy_stream_impl_lite.h
/usr/include/google/protobuf/message.h
/usr/include/google/protobuf/message_lite.h
/usr/include/google/protobuf/reflection_ops.h
/usr/include/google/protobuf/repeated_field.h
/usr/include/google/protobuf/service.h
/usr/include/google/protobuf/stubs/
/usr/include/google/protobuf/stubs/common.h
/usr/include/google/protobuf/stubs/once.h
/usr/include/google/protobuf/text_format.h
/usr/include/google/protobuf/unknown_field_set.h
/usr/include/google/protobuf/wire_format.h
/usr/include/google/protobuf/wire_format_lite.h
/usr/include/google/protobuf/wire_format_lite_inl.h