system_api: remove unused NFC related D-Bus constants BUG=None TEST=precq pass Change-Id: I41ae9ebf6d49f5b89ce9c042646e1f2ce98b426d Reviewed-on: https://chromium-review.googlesource.com/1262880 Commit-Ready: Ben Chan <benchan@chromium.org> Tested-by: Ben Chan <benchan@chromium.org> Reviewed-by: Mike Frysinger <vapier@chromium.org> Cr-Mirrored-From: https://chromium.googlesource.com/chromiumos/platform2 Cr-Mirrored-Commit: df7517d815f6827a3999d1e639e53b5c10ac8032
This directory (platform2/system_api) contains constants and definitions like D-Bus service names that are shared between Chromium and Chromium OS.
This directory is only for things like headers and .proto files. No implementation should be added.
When writting a .proto file make sure to use:
option optimize_for = LITE_RUNTIME;
This will force usage of a lite protobuf instead of a full/heavy weight protobuf. The browser only links against the light version, so you will get cryptic link errors about missing parts of Message if you define a protobuf here and then try to use it in Chrome. Currently CrOS links against the full protobuffer library, but that might change in the future.
When declaring a protobuf, avoid use of required unless it is exactly what you mean. “Required is Forever” and very rarely should actually be used. Consult Protocol Buffer Basics: C++ for a detailed of this issue.