system_api: Add missing signal DlcStateChanged in dlcservice

We forgot this in crrev.com/c/2207631

BUG=chromium:1071260
TEST=CQ passes

Change-Id: Iebf6543207d3120d327eec49621fb0e8e973404c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2214335
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Commit-Queue: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Cr-Mirrored-From: https://chromium.googlesource.com/chromiumos/platform2
Cr-Mirrored-Commit: 18618dc7a1e57008429584cd5408407ac161bd97
1 file changed
tree: 6990fdc47ae2293b81e1c2449e5026de98dee938
  1. constants/
  2. dbus/
  3. src/
  4. switches/
  5. .gitignore
  6. BUILD.gn
  7. build.rs
  8. Cargo.toml
  9. LICENSE
  10. OWNERS
  11. README.md
  12. system_api.pc
README.md

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.