Read-only gsubtree of platform2/system_api/ code

Clone this repo:
  1. 633fc03 cryptohome: remove Pkcs11IsTpmTokenReadyForUser method by Eric Caruso · 13 hours ago master
  2. 30bccec system_api: drop apmanager headers by Ben Chan · 13 hours ago
  3. 053920c system_api: vm_cicerone: add async StartLxdContainer by Stephen Barber · 4 days ago
  4. efc27cc system_api: define D-Bus method to check if Plugin VM feature is enabled by Dmitry Torokhov · 5 days ago
  5. 8e2b6a5 system_api: remove unnecessary MODULE_LICENSE_BSD by Ben Chan · 6 days ago

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.