message: Delete a gcc workaround in rtc::FinalRefCountedObject
  with bot using old version of gcc removed, this workaround is not needed.
  Cr-Commit-Position: refs/heads/master@{#33592}
diff: @@ -80,14 +80,7 @@ class FinalRefCountedObject final : public T {
  private:
  ~FinalRefCountedObject() = default;
  - // gcc v7.1 requires default contructors for members of
  - // `FinalRefCountedObject` to be able to use inherited constructors.
  - // TODO(danilchap): Replace with simpler braced initialization when
  - // bot support for that version of gcc is dropped.
  - class ZeroBasedRefCounter : public webrtc::webrtc_impl::RefCounter {
  - public:
  - ZeroBasedRefCounter() : RefCounter(0) {}
  - } mutable ref_count_;
  + mutable webrtc::webrtc_impl::RefCounter ref_count_{0};
  };
  } // namespace rtc
  