message: Avoid an abort since it might be possible for the stat to be unregistered twice
  Summary: Avoid an abort since it might be possible for the stat to be unregistered twice
diff: @@ -502,7 +502,7 @@ ThreadLocalStatsT<LockTraits>::~ThreadLocalStatsT() {
  }
  }
  - CHECK(tlStats_.empty());
  + DCHECK(tlStats_.empty());
  }
  template <class LockTraits>
  @@ -517,7 +517,8 @@ void ThreadLocalStatsT<LockTraits>::unregisterStat(TLStatT<LockTraits>* stat) {
  MainGuard g(lock_);
  size_t numErased = tlStats_.erase(stat);
  - CHECK_EQ(1, numErased)
  + (void)numErased; // opt build unused
  + DCHECK_EQ(1, numErased)
  << "attempted to unregister a stat that was not registered: "
  << stat->name() << " (" << tlStats_.size() << " registered)";
  }
  