message: Change to size_t from int.
diff: @@ -54,7 +54,7 @@ void DynamicBuffer::AddJoinedString(const std::vector<StringRef>& strings,
  data_.resize(data_.size() + total_len);
  char* dst = data_.data() + offset_.back();
  - for (int i = 0; i < strings.size(); ++i) {
  + for (size_t i = 0; i < strings.size(); ++i) {
  // Fill separator if not first string.
  if (i != 0) {
  memcpy(dst, separator.str, separator.len);
  