message: Make operator parameters consistent.
diff: @@ -164,8 +164,8 @@ class Status {
  }
  const std::string& error_message() const { return message_; }
  - bool operator==(const Status& x) const;
  - bool operator!=(const Status& x) const;
  + bool operator==(const Status& other) const;
  + bool operator!=(const Status& other) const;
  // NoOp
  void IgnoreError() const {
  