message: Recommend using [[deprecated]] over ABSL_DEPRECATED
  Cr-Commit-Position: refs/heads/main@{#36696}
diff: @@ -73,12 +73,12 @@ referencing a WebRTC bug, prefer the url form, e.g.
  ### Deprecation
  Annotate the declarations of deprecated functions and classes with the
  -[`ABSL_DEPRECATED` macro][ABSL_DEPRECATED] to cause an error when they're used
  +[`[[deprecated]]` attribute][DEPRECATED] to cause an error when they're used
  inside WebRTC and a compiler warning when they're used by dependant projects.
  Like so:
  ```cpp
  -ABSL_DEPRECATED("bugs.webrtc.org/12345")
  +[[deprecated("bugs.webrtc.org/12345")]]
  std::pony PonyPlz(const std::pony_spec& ps);
  ```
  @@ -90,7 +90,7 @@ getting errors, do something like this:
  ```cpp
  std::pony DEPRECATED_PonyPlz(const std::pony_spec& ps);
  -ABSL_DEPRECATED("bugs.webrtc.org/12345")
  +[[deprecated("bugs.webrtc.org/12345")]]
  inline std::pony PonyPlz(const std::pony_spec& ps) {
  return DEPRECATED_PonyPlz(ps);
  }
  @@ -100,6 +100,12 @@ In other words, rename the existing function, and provide an inline wrapper
  using the original name that calls it. That way, callers who are willing to
  call it using the `DEPRECATED_`-prefixed name don't get the warning.
  +NOTE 3: Occasionally, with long descriptions, `git cl format` will do the wrong
  +thing with the attribute. In that case, you can use the
  +[`ABSL_DEPRECATED` macro][ABSL_DEPRECATED], which is formatted in a more
  +readable way.
  +
  +[DEPRECATED]: https://en.cppreference.com/w/cpp/language/attributes/deprecated
  [ABSL_DEPRECATED]: https://source.chromium.org/chromium/chromium/src/+/main:third_party/abseil-cpp/absl/base/attributes.h?q=ABSL_DEPRECATED
  ### ArrayView
  