message: GCS Throttle: 1 token == 1 Kb
  Previously, 1 token was approximately 256 bytes. This is slightly less
  intuitive than 1 kb.
diff: @@ -126,7 +126,7 @@ class GcsThrottle {
  void UpdateState() EXCLUSIVE_LOCKS_REQUIRED(mu_);
  inline uint64 request_bytes_to_tokens(size_t num_bytes) {
  - return num_bytes >> 8;
  + return num_bytes >> 10;
  }
  mutex mu_;
  